Qhov sib txawv tseem ceeb ntawm ABS thiab PBT yog tias ABS yog piv rau cov khoom siv hluav taws xob pheej yig tab sis tsis tshua muaj zog, qhov PBT yog piv cov khoom kim thiab ruaj khov dua polymer.
ABS thiab PBT yog cov lus siv los sau npe ob yam khoom siv polymer sib txawv. ABS stands rau acrylonitrile butadiene styrene polymer, thaum PBT stands rau polybutylene terephthalate polymer.
YABS yog dab tsi?
ABS yog acrylonitrile butadiene styrene polymer khoom. Nws yog cov khoom siv thermoplastic uas muaj nws cov iav hloov pauv kub ntawm li 105 degrees Celsius. Cov tshuaj no yog amorphous thiab tsis muaj qhov tseeb melting point. Tsis tas li ntawd, nws yog cov khoom siv terpolymer uas yog tsim los ntawm polymerization ntawm styrene, acrylonitrile thiab polybutadiene. Cov proportions uas peb yuav tsum tau coj los ntawm txhua reactant tuaj yeem sib txawv nyob ntawm qhov xav tau cov khoom kawg. E.g. Kev sib xyaw ua ke feem ntau yog 15-30% ntawm acrylonitrile, 5-30% butadiene, thiab 40-60% styrene. Qhov kev sib xyaw ua ke no tsim cov saw ntev ntawm polybutadiene uas yog crisscrossed nrog luv luv ntawm poly9styrene-co-acrylonitrile).
Daim duab 01: Khoom ua los ntawm ABS
Cov pab pawg nitrile hauv cov khoom no tuaj yeem ua rau polarity ntawm cov saw hlau polymer, uas tuaj yeem sib nyiam. Qhov no ua rau cov khoom muaj zog dua li ntshiab polystyrene. Tsis tas li ntawd, cov pab pawg acrylonitrile tuaj yeem ua rau cov tshuaj tiv thaiv, qaug zog, hardness, thiab rigidity ntawm cov khoom. Cov pab pawg styrene hauv cov khoom siv no tuaj yeem ua rau cov yas kom tau lub ntsej muag ci ntsa iab thiab tuaj yeem txhim kho hardness thiab rigidity, thiab ua kom yooj yim rau cov txheej txheem ntxiv.
Cov khoom zoo tshaj plaws ntawm ABS suav nrog kev cuam tshuam, toughness, thiab rigidity. Peb tuaj yeem ua kom nthuav dav ntxiv qhov cuam tshuam los ntawm kev nce qhov sib npaug ntawm polybutadiene piv rau styrene. Ntxiv mus, ABS polymers tiv taus aqueous acids, alkalis, concentrated HCl thiab phosphoric acids. Cawv, thiab lwm yam.
PBT yog dab tsi?
PBT yog polybutylene terephthalate. Nws yog thermoplastic engineering polymer. Peb tuaj yeem siv cov khoom siv no ua ib qho insulator rau kev siv hluav taws xob thiab hluav taws xob. Peb tuaj yeem faib cov khoom no ua cov thermoplastic, crystalline polymer thiab ua ib hom polyester. Cov tshuaj no tiv taus cov kuab tshuaj, thiab shrinking yog negligible thaum tsim. Tsis tas li ntawd, nws yog mechanically muaj zog, tshav kub-resistant mus txog 150 degrees Celsius.
Daim duab 02: Cov qauv tshuaj ntawm PBT
Thaum xav txog cov ntawv thov ntawm PBT, nws muaj txiaj ntsig zoo rau tsev nyob hauv hluav taws xob engineering. Tsis tas li ntawd, nws yog ib qho tseem ceeb hauv kev tsim kho tsheb raws li cov ntsaws txuas thiab hauv cov taub hau da dej lossis cov hlau. Peb tuaj yeem pom cov txheej txheem no rau hauv cov fibers ntawm cov txhuam hniav, cov plaub muag cuav, thiab tseem nyob rau hauv cov keycaps ntawm qee qhov kawg ntawm lub computer keyboards.
Qhov txawv ntawm ABS thiab PBT yog dab tsi?
ABS thiab PBT yog cov khoom siv polymer uas muaj cov tshuaj lom neeg thiab lub cev sib txawv. ABS yog acrylonitrile butadiene styrene polymer khoom, thaum PBT yog polybutylene terephthalate polymer khoom. Qhov sib txawv tseem ceeb ntawm ABS thiab PBT yog tias ABS yog qhov sib piv pheej yig tab sis tsis tshua muaj zog, qhov PBT yog qhov sib piv kim thiab ruaj khov dua. Ntxiv mus, ABS yog tsim los ntawm cov txheej txheem emulsion polymerization, thaum PBT yog tsim los ntawm polycondensation polymerization txoj kev. Tsis tas li ntawd, ABS yog tsim los ntawm acrylonitrile, butadiene, thiab styrene thaum PBT yog tsim los ntawm terephthalic acid los yog dimethyl terephthalate thiab 1, 4-butanediol. Yog li, qhov no yog lwm qhov sib txawv loj ntawm ABS thiab PBT.
Hauv qab no yog cov ntsiab lus ntawm qhov sib txawv ntawm ABS thiab PBT hauv daim ntawv teev npe.
Summary – ABS vs PBT
ABS yog cov khoom siv acrylonitrile butadiene styrene polymer. PBT yog cov khoom siv polybutylene terephthalate polymer. Qhov sib txawv tseem ceeb ntawm ABS thiab PBT yog qhov sib piv, ABS yog pheej yig tab sis tsis tshua muaj zog, qhov PBT kim thiab ruaj khov dua.
