Hloov kho magnesium hydroxide Txhim kho polymer kev ua tau zoo los ntawm kev txhim kho cov nplaim hluav taws xob, thermal stability, thiab cov khoom siv kho tshuab los ntawm kev kho qhov chaw tshwj xeeb uas ua kom zoo rau kev tawg thiab kev sib raug zoo hauv polymer matrices. Qhov no engineered additive decomposes endothermically ntawm qhov kub thiab txias, tso dej vapor uas txias combustion zones thaum tsim kev tiv thaiv char khaubncaws sab nraud povtseg uas tiv thaiv cov ntaub ntawv los ntawm tshav kub thiab oxygen.
Thoob plaws ntiaj teb B2B kev yuav khoom lag luam, kev thov siab rau - cov nplaim hluav taws kub hnyiab tau nce ntxiv vim cov tuam ntxhab ntsib cov kev tswj hwm kev nyab xeeb ntxiv thiab cov cai tswj hwm kev ruaj ntseg. Peb phau ntawv qhia kev tshawb xyuas qhov chaw nyob li cas - hloov kho magnesium hydroxide daws cov teeb meem tseem ceeb hauv qis - pa taws halogen- tsis pub siv cable, nplaim hluav taws - cov khoom siv hluav taws xob tsis zoo, thiab cov txheej txheem polymer siab heev. Cov kws tshaj lij kev muag khoom thiab cov kws tshaj lij engineers yuav tshawb pom cov kev nkag siab zoo rau cov qauv kev soj ntsuam ntawm tus neeg muag khoom, tus nqi - kev tshuaj xyuas kev ua tau zoo, thiab cov txheej txheem kev lees paub kev ua haujlwm uas ua kom ntseeg tau tias cov kev txiav txim siab nrhiav tau raws li kev ua haujlwm zoo thiab lub luag haujlwm ib puag ncig.
Nkag siab Hloov Kho Magnesium Hydroxide thiab Nws Lub Luag Haujlwm hauv Polymers
Dab tsi Ua Qhov Kev Hloov Kho Qhov Ncauj tseem ceeb?
Standard Modified Magnesium Hydroxide tuaj yeem hloov mus rau hauv ib qho ntxiv uas ua haujlwm nrog cov polymers los ntawm kev siv cov khoom sib txuas, txheej txheej txheej txheem, lossis cov txheej txheem tshuaj sib txuas los hloov qhov chaw. Cov txheej txheem no txo cov polarity thiab rhiab heev ntawm qhov chaw hydroxyl pawg. Qhov no ua rau nws yooj yim dua rau inorganic hais thiab organic polymer chains los ua ke zoo dua. Thaum cov qib tsis hloov pauv muaj cov ntawv cog lus muaj zog hydrogen uas ua rau cov khoom sib txuas ua ke, cov kev hloov pauv tau nthuav tawm tusyees nyob rau hauv polymer melts thiab ua kom lawv cov neeg kho tshuab kev ncaj ncees txawm nyob rau hauv siab loading theem uas yuav tsum tau rau nplaim retardancy ua hauj lwm.
Thermal Decomposition Mechanism
Thaum kub siab tshaj 330 degree, Hloov Magnesium Hydroxide lov rau hauv magnesium oxide thiab dej vapor los ntawm endothermic decomposition. Cov txheej txheem no yuav siv ntau lub zog cua sov-kwv yees li 1450 J / g- uas ua rau qhov kub ntawm cov polymer qhov chaw qis dua qhov taw tes uas nws tuaj yeem ntes hluav taws. Cov dej vapor uas tso tawm thins tawm cov nplaim hluav taws xob hauv thaj chaw nplaim taws, thiab magnesium oxide uas ua rau cov ntaub ntawv tuab, tiv thaiv char txheej uas txwv tsis pub oxygen nkag mus thiab ua rau muaj kev puas tsuaj ntau dua. Qhov ob- qhov system no tso tawm cov nplaim taws uas tsis muaj teeb meem halogens lossis corrosive seem.
Environmental thiab Safety Advantages
Surface-Modified Magnesium Hydroxide yog qhov zoo dua rau lub ntiaj teb ntau dua li cov nplaim hluav taws uas muaj brominated lossis chlorinated. Thaum nws kub hnyiab, magnesium oxide thiab chav, uas yog byproducts ntawm nws tawg, tsim me me pa luam yeeb thiab tsis muaj dioxin. Cov yam ntxwv no tseem ceeb heev rau qis - pa taws halogen- siv cable dawb, vim cov pa phem tuaj yeem ua rau muaj kev phom sij heev rau kev noj qab haus huv hauv cheeb tsam me. Nws yooj yim ua raws li cov cai rau RoHS, REACH, thiab UL cov qauv, uas tshem tawm cov ntaub ntawv nyuaj uas tuaj nrog tswj cov khoom txaus ntshai.
Common Polymer Performance Challenges Hais los ntawm MMH
Dispersion thiab Compatibility teeb meem
Traditional inorganic fillers feem ntau ua rau nws nyuaj rau cov txheej txheem polymers vim tias lawv tsis ua haujlwm zoo nrog cov matrix. Yog koj tsis kho covHloov kho Magnesium hydroxideparticles, lawv yuav lo ua ke thaum lub sij hawm compounding txheej txheem. Qhov no ua rau cov cheeb tsam tsis muaj zog uas tso cai rau cov kab nrib pleb sib kis thaum cov pob zeb nyuaj siab. Cov qib sib txawv tau raug hloov mus rau suav nrog silane coupling agents, fatty acid films, lossis cov txheej txheem titanate uas sib txuas nrog cov pob txha polymer. Qhov kev txhim kho rau lub interface no tshem tawm cov khoom sib cais, ua kom cov khoom sib npaug sib npaug, thiab ua kom lub zog tensile, cuam tshuam tsis kam, thiab elongation zoo uas tseem ceeb rau kev siv tawv.
Kev kub ceev kev txwv
Lwm cov nplaim taws retardant yog aluminium hydroxide, uas tawg ntawm ib ncig ntawm 200 degree. Qhov no yog qhov qis dua qhov ua haujlwm kub li qub rau engineering thermoplastics xws li polypropylene (220-260 degree) thiab polyamide (270-290 degree). Qhov kub tsis ruaj tsis khov no cia dej tawm sai dhau thaum lub sijhawm extrusion lossis txhaj tshuaj molding, uas ua rau muaj qhov tsis zoo, qhov ntev tsis ruaj khov, thiab cov khoom siv xeb. Hloov kho Magnesium Hydroxide nyob ruaj khov mus txog 330-340 degree, uas tso cai rau siab -cov yas kub tau ua tiav tau yooj yim thiab muab cov nplaim hluav taws zoo dua qub ntawm cov khoom thauj khoom qub.
Mechanical Property Retention
Cov qib siab ntawm cov fillers, feem ntau yog nruab nrab ntawm 55 thiab 65% los ntawm qhov hnyav, xav tau rau cov nplaim hluav taws, tab sis lawv feem ntau ua rau cov polymers tsis muaj zog. Kev ntxhov siab yog ua kom muaj zog los ntawm cov khoom tsis muaj zog, uas txo qis lub zog ntawm kev cuam tshuam thiab qhov ntev ntawm kev tawg. Kev hloov pauv saum npoo ua rau cov kev sib tshuam ntawm cov matrix thiab cov txheej txheem muab tub lim hloov tau yooj yim dua, yog li lawv tuaj yeem nqus tau lub zog thiab txav tau yooj yim dua. Nanoscale hais (D50<2µm) in higher grades make the most of the surface area contact, which improves the reinforcement effects even more while keeping the Modified Magnesium Hydroxide properties.
Daim ntawv thov thaj chaw ntawm Hloov Magnesium Hydroxide hauv Polymers
Tsawg-Smoke Halogen-Cov Khoom Siv Hluav Taws Xob Dawb
Hloov kho Magnesium Hydroxide feem ntau yog siv hauv cov hluav taws xob xa hluav taws xob, tswj cov kab hluav taws xob, thiab kev sib txuas lus cables uas yuav tsum tau ua kom tau raws li cov qauv kev nyab xeeb hluav taws xob nruj. Kev lag luam hlau thiab cable yog cov neeg siv khoom loj tshaj plaws ntawm cov tshuaj no. Polyethylene thiab ethylene-vinyl acetate copolymer khoom nrog 60–65% Hloov Kho Magnesium Hydroxide dhau qhov ntsuas cov pa ntsuas qis dua 28% thiab tau txais UL 94 V-0 kev ntsuas. Cov khoom sib xyaw no ua tau raws li cov qauv tsim los ntawm IEC 60332, IEC 61034, thiab CPR Euroclass. Lawv kuj hloov tau thiab tsis ua hluav taws xob, uas yog qhov tseem ceeb rau kev teeb tsa thiab kev ua haujlwm ntev.
Engineering Thermoplastics Compounding
Hloov kho Magnesium Hydroxide yog siv los ntawm cov tuam txhab uas tsim cov polypropylene, polyamide, thiab thermoplastic polyurethane kom ua tau raws li cov qauv hluav taws xob hluav taws xob hauv hluav taws xob, kev tsim kho, thiab kev lag luam tsheb. Cov khoom sab hauv ntawm lub tsheb ua haujlwm zoo dua thaum lawv tsis ntws thaum lawv hlawv thiab thaum cov pa phem tsis tso tawm ntau npaum li thaum hluav taws kub. UL 94 V-0 daim ntawv pov thawj yog muab rau cov npog hluav taws xob thiab cov vaj tsev sib txuas yam tsis muaj kev cuam tshuam rau lawv txoj kev nyab xeeb lossis kev saib sab nraud. Cov khoom uas tsis yog-corrosive decomposition khaws cov khoom siv hluav taws xob me me thiab cov khoom hlau hauv cov qauv molded muaj kev nyab xeeb.
Kev siv thermoplastic Elastomer
Roj hmab-hloov cov polymers thiab cov thermoplastic elastomers yog siv los ua cov siv conveyor, sealing profiles, thiab cov hoses hloov tau. Lawv yuav tsum yog nplaim retardant, stretchy, thiab resistant rau hnav thiab tsim kua muag. Hloov kho Magnesium Hydroxide qib nrog kev tswj cov khoom loj me me kom cov theem elastomeric 'yooj yim yooj yim thaum muab Class A lossis Class B nplaim hluav taws sib kis. Thaum qhov kub thiab txias tau hloov, cov txheej txheem saum npoo nres qhov muab tub lim los ntawm kev txav mus los. Qhov no ua rau cov khoom lag luam ua haujlwm ruaj khov dua nws cov kev pabcuam tag nrho hauv cov chaw tsim khoom hnyav.
Kev txiav txim siab-Tau qhov tseem ceeb rau Kev Yuav Hloov Magnesium Hydroxide
Kev Tshawb Fawb Txog Kev Ua Haujlwm Zoo thiab Kev Qhia Tshwj Xeeb
Kev tshuaj xyuas ntawm kev yuav khoom pib nrog kev kuaj xyuas tag nrho cov kev ntsuas kev ua haujlwm. Qee qhov tshwj xeeb tseem ceeb yog qhov loj me me (D50 feem ntau yog nruab nrab ntawm 1.5 thiab 3.0μm rau qhov zoo tshaj plaws dispersion),Hloov kho Magnesium hydroxidecov ntsiab lus (Ntau dua lossis sib npaug li 95%), cov ntsiab lus noo noo (<0.5% to avoid processing problems), and the type of surface treatment (silane, stearic acid, or proprietary coatings). The quality of the finished product is directly affected by how consistent batches are with each other. For this reason, statistical process control documentation and a review of the certificate of analysis are important parts of the steps for qualifying suppliers.
Muaj peev xwm tsim khoom thiab txhawb kev tsim kho vaj tse
Ntxiv nrog rau cov khoom tshwj xeeb, cov txuj ci kev pab cuam ntawm tus neeg muag khoom muaj kev cuam tshuam loj npaum li cas ntawm kev siv mus. Pab nrog kev sib xyaw ua ke, kev sim rau kev sib raug zoo nrog qee cov qib polymer, thiab cov kev pabcuam uas pab koj tau txais txiaj ntsig zoo tshaj plaws ntawm koj cov kev ua tsis tau tag nrho txiav rau lub sijhawm txhim kho thiab cov khoom pov tseg thaum lub sijhawm tsim nyog. Cov chaw muab kev pabcuam tsim muaj cov kws tshaj lij uas paub txog cov cai thiab cov cai hauv cheeb tsam, uas ua rau nws yooj yim dua los ua cov ntaub ntawv ua raws. Cov qauv uas tuaj yeem txiav txim me me ua rau tus nqi - kev sim ua ntej ua tau zoo ua ntej cog lus rau kev cog lus yuav khoom ntau.
Supply Chain Reliability Considerations
Cov khoom siv raw khoom muaj qhov cuam tshuam ncaj qha rau kev txuas ntxiv ntawm kev tsim khoom. Chemically synthesized Modified Magnesium Hydroxide cov chaw muag khoom uas tau txais lawv cov magnesium los ntawm seawater los yog brine yog ruaj khov nyob rau hauv lub sij hawm ntev dua li ntxhia-raws li cov neeg tsim khoom uas nyob ntawm qhov txwv ore reserves. Cov kev pheej hmoo cuam tshuam tsawg dua thaum koj siv ntau lub tswv yim nrhiav, tshwj xeeb tshaj yog thaum koj nrhiav lwm tus neeg muag khoom uas ua tau raws li cov kev cai qub. Cov saw hlau resilience yog ib qho tseem ceeb rau tsuas yog - hauv - lub sij hawm tsim khoom. Nws suav nrog cov khoom xws li lub sijhawm ua haujlwm zoo ib yam, pab tswj cov khoom muag, thiab cov chaw tsim khoom nthuav dav thoob plaws ntiaj teb.
Nws yog ib qho tseem ceeb kom paub tias tag nrho cov nqi ntawm cov tswv cuab suav nrog ntau dua li cov nqi tsev xwb. Nws kuj suav nrog cov nqi ntawm cov khoom thauj khoom thauj khoom, khaws cov khoom muag, thiab cov khoom zoo- ntsig txog cov khib nyiab. Feem ntau, kev yuav hauv cov khoom txuag koj 8 txog 15 feem pua ntawm tus nqi, tab sis qhov chaw cia thiab nyiaj ntsuab koj xav tau yuav tsum phim koj cov nqi siv. Cov ntawv cog lus tuav hauv cheeb tsam pab cov lag luam thoob ntiaj teb txuag nyiaj ntawm cov nqi thauj khoom thiab txo lub sijhawm xa khoom. Kev sib raug zoo hauv kev ua tau zoo cuam tshuam txog kev ua haujlwm hauv qab dej kom zoo li cas. Piv txwv li, cov khoom sib cais zoo dua txo qis ntawm kev sib xyaw ua ke thiab kev siv lub zog, uas txuag nyiaj uas tuaj yeem siv los them cov khoom kim dua.
Optimizing Polymer Performance nrog MMH: Kev Ua Haujlwm thiab Kev Tshawb Fawb
Compounding thiab ua cov txheej txheem
Rau kev sib koom ua haujlwm, koj xav tau siab - siv cov khoom siv sib xyaw uas tuaj yeem muab lub zog shear txaus kom nthuav tawm cov muab tub lim tawm yam tsis tau rhuav tshem cov polymer ntau dhau. Ntxaib- ntsia hlau extruders nrog txoj cai ntsia hlau configurations tuaj yeem faib cov khoom sib npaug ntawm cov qib siab txog li 65% los ntawm qhov hnyav. Cov extruders no feem ntau muaj cov khoom sib faib thiab dispersive sib xyaw ua ke.Hloov kho Magnesium hydroxidethaum tseem tso cai rau cov polymer kom yaj tag thiab muaj cov khoom ntws zoo. Kev txhim kho lub sijhawm nyob hauv qhov zoo sib xws nrog qhov zoo ntawm kev sib kis nrog qhov ntev ntawm cov thermal contact.
Kev Ntsuas Kev Ua Haujlwm
Cov txheej txheem txheej txheem yog siv rau kev siv hluav taws xob tiv thaiv hluav taws xob, xws li ntsuas qhov ntsuas qhov ntsuas qhov ntsuas oxygen (LOI), ua qhov ntsuas hluav taws xob ntsug raws li UL 94, thiab ntsuas qhov ntsuas kub tso tawm siv lub khob hliav qab calorimetry. Kev ntsuam xyuas rau cov khoom siv kho tshuab suav nrog lub zog tensile, elongation ntawm kev tawg, khoov khov kho, thiab cuam tshuam tsis kam ntawm qee qhov kub. Kev ntsuam xyuas pa luam yeeb raws li ASTM E662 thiab kev kuaj tshuaj lom neeg raws li NES 713 thim rov qab cov lus thov ntawm qis- pa taws, halogen- ua haujlwm dawb. Kev sim ua kom paub tseeb tias cov khoom ua tau raws li qhov xav tau ntawm qhov kawg - siv daim ntawv thov thiab tag nrho tsoomfwv cov cai.
Kev Tsim Kho Kev Tsim Kho Tshiab Tshiab
Cov kws tshawb fawb tseem tab tom saib mus rau hauv nano- qauv Hloov Kho Magnesium Hydroxide uas muaj thaj tsam siab dua - rau - ntim piv. Qhov no ua rau nws muaj peev xwm ua rau cov nplaim hluav taws ua haujlwm ntawm cov khoom qis qis uas tsis cuam tshuam rau lawv cov khoom siv tshuab ntau dhau. Kev sib xyaw ntau yam tshuaj kho qhov chaw hauv hybrid hloov kho txoj kev txhim kho kev sib raug zoo thoob plaws ntau yam ntawm cov tsev neeg polymer. Thaum koj sib tov Modified Magnesium Hydroxide nrog cov khoom xyaw intumescent lossis carbon-raws li char boosters, koj tau txais cov nplaim hluav taws zoo dua thaum tseem pab txo qhov hnyav uas tseem ceeb rau kev siv hluav taws xob thiab kev thauj mus los. Nrog rau cov kev tsim kho tshiab no, Hloov Kho Magnesium Hydroxide dhau los ua cov thev naus laus zis tseem ceeb rau ntev - kav ntev, siab - cov kev ua tau zoo polymer cov kev daws teeb meem uas tuaj yeem hloov kho cov kev xav tau ntawm kev lag luam.
Xaus
Hloov kho Magnesium hydroxideyog ib qho tseem ceeb ntawm cov nplaim hluav taws uas ua tau raws li qhov xav tau kev ua haujlwm tseem ceeb hauv ntau hom kev siv polymer. Nws yog cov khoom siv zoo tshaj plaws rau kev ua kom qis - pa taws halogen- cov cables dawb, cov khoom siv thermoplastics, thiab cov tshuab elastomeric uas xav tau cov qauv kev nyab xeeb hluav taws kub ceev vim tias nws ruaj khov heev ntawm qhov kub thiab txias, nyab xeeb rau ib puag ncig, thiab sib haum nrog cov khoom siv hluav taws xob. Lub tswv yim kev yuav khoom uas tsom mus rau cov neeg muab khoom 'kev txawj ntse, zoo ib yam, thiab cov khoom siv sib txuas ua haujlwm tau lees paub qhov kev ua tau zoo uas ua tau raws li cov hom phiaj ua haujlwm zoo tshaj plaws thiab cov kev cai ua raws cai. Raws li kev thov kom muaj kev ruaj ntseg tau nruj dua thiab cov qauv kev ua tau zoo nce, Hloov Kho Magnesium Hydroxide thev naus laus zis hloov pauv los txhawb kev tsim kho tshiab hauv cov qauv polymer siab heev.
FAQ
Yuav ua li cas hloov magnesium hydroxide piv rau txhuas hydroxide nyob rau hauv daim ntawv thov polymer?
Hloov kho Magnesium Hydroxide muaj qhov kub thiab txias dua (330-340℃vs . 200 degree), uas ua rau nws muaj peev xwm ua haujlwm nrog cov khoom siv thermoplastics uas xav tau kev kub extrusion ntau dua. Nws muaj tib theem ntawm cov nplaim taws retardancy tab sis li ntawm 30% tsawg loading, thaum ua kom cov khoom siv kho tshuab thiab txo cov compound ntom. Ob Qhov Hloov Kho Magnesium Hydroxide thiab halogen- cov khoom pub dawb muaj kev nyab xeeb rau ib puag ncig, tab sis Hloov Kho Magnesium Hydroxide ua pa tsawg dua thaum nws hlawv.
Qhov loj npaum li cas yog qhov zoo rau kev hloov kho magnesium hydroxide hauv nplaim taws-cov tshuaj tiv thaiv kab mob?
Kev xaiv ntawm particle loj nyob ntawm qhov xav tau ntawm cov khoom. Rau nyias - phab ntsa txhaj tshuaj molding thiab siab - cov xov hlau ua tau zoo, cov qib zoo nrog D50 qhov tseem ceeb ntawm 1.5 thiab 2.5μm ua kom thaj tsam loj tshaj plaws rau cov nplaim hluav taws zoo dua thiab cov khoom siv kho tshuab. Coarser qib (D50 3-5μm) yog qhov zoo dua rau cov nqi qis- siv uas tsuas yog xav tau cov nplaim hluav taws xob tsim nyog. Ultra{10}} qib submicron zoo ua rau cov qauv ib nrab- cov qauv txhais tau meej dua, tab sis lawv xav tau cov cuab yeej tshwj xeeb kom sib cais.
Puas tuaj yeem hloov kho magnesium hydroxide tuaj yeem ua ke nrog lwm cov nplaim hluav taws rau kev ua haujlwm zoo dua?
Kev sib xyaw ua haujlwm zoo ua ke feem ntau muaj cov txiaj ntsig kev ua tau zoo uas ntau dua li cov txiaj ntsig ntawm tus kheej. Thaum koj sib tov Modified Magnesium Hydroxide nrog nthuav graphite, tag nrho cov additives uas koj siv mus down, thiab char creation tau zoo dua. Thaum siv nrog melamine-raws li intumescent systems, UL 94 V-0 kev ntsuam xyuas tau txhim kho nyob rau hauv tawv polymer matrices. Ntxiv phosphorus tebchaw ua rau ci ntsa iab-cov teeb pom kev zoo ntawm cov hluav taws xob siv hluav taws xob. Kev ntsuam xyuas rau kev sib raug zoo ua kom paub tseeb tias kev sib raug zoo ntawm cov khoom siv ntxiv tsis tau mus rau hauv txoj kev ntawm cov txheej txheem lossis kev ruaj ntseg mus sij hawm ntev.
Koom tes nrog Henghao Technology rau Premium Modified Magnesium Hydroxide Solutions
Henghao Technology Development (Hangzhou) Co., Ltd. tau muab kev ua haujlwm siab -Hloov kho Magnesium hydroxiderau polymer manufacturers thoob ntiaj teb rau ntau tshaj nees nkaum xyoo. Peb cov chemically synthesized qib muaj qhov sib npaug ntawm qhov loj me me, kev hloov kho qhov chaw zoo dua qub, thiab kev ntseeg tau los ntawm batch mus rau batch, uas pab pawg neeg yuav khoom nyob ntawm seb yuav ua li cas kom ua tau zoo. Raws li ib tug zoo -paub Modified Magnesium Hydroxide tsum, peb pab 33 lub teb chaws nrog lawv cov yas, cable manufacturing, thiab composite khoom xav tau kev pab. Peb muab kev txhawb nqa tag nrho, xws li kev qhia txog kev ua kom zoo tshaj plaws, kev pabcuam kuaj kev sib raug zoo, thiab pab nrog cov ntaub ntawv ua raws cai. Email peb daim ntawv thov engineering pab neeg ntawminfo@henghaopigment.comkom tau txais cov ntaub ntawv ntxaws ntxaws, cov qauv ntawm cov khoom, thiab cov lus hais kom haum rau qhov kev xav tau ntawm koj cov khoom siv.
Cov ntaub ntawv
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3. Rothon, RN, & Hornsby, PR (2019). "Cov nplaim retardant cuam tshuam ntawm Magnesium hydroxide." Polymer Degradation thiab Stability, 154, 3-12.
4. Lautid, F., Bonnaud, L., Alexandre, M., Lopez-Cuesta, JM, & Dubois, P. (2017). "Kev Pom Zoo Tshiab hauv Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob: Los ntawm Cov Txheej Txheem rau Nanocomposites." Materials Science thiab Engineering, 63(3), 100-125.
5. Dasari, A., Yu, ZZ, Cai, GP, & Mai, YW (2021). "Kev txhim kho tsis ntev los no nyob rau hauv hluav taws kub retardancy ntawm cov ntaub ntawv Polymeric." Kev nce qib hauv Polymer Science, 38(9), 1357-1387.
6. Morgan, AB, & Gilman, JW (2019). "Ib qho txheej txheem ntawm nplaim hluav taws kub nyhiab ntawm cov ntaub ntawv Polymeric: Daim Ntawv Thov, Tshuab, thiab Cov Lus Qhia Yav Tom Ntej." Hluav Taws thiab Khoom Siv, 37(4), 259-279.
