Qhov Tseem Ceeb - PLA vs ABS
PLA thiab ABS yog ob lub elastomers organic uas muaj ntau yam kev siv vim lawv cov khoom tshwj xeeb. Qhov sib txawv tseem ceeb ntawm PLA thiab ABS yog tias PLA yog biodegradable aliphatic polyester, thaum ABS yog non-biodegradable thermoplastic elastomer. Ntxiv rau qhov no, muaj qee qhov sib txawv ntawm ob lub polymers uas yuav tau tham ntxiv hauv kab lus no. Ob lub elastomers no kuj siv rau kev siv sib txawv vim cov khoom sib txawv.
PLA (Polylactic Acid) yog dab tsi?
PLA yog biodegradable aliphatic polyester uas muaj ntau yam kev siv. Vim nws biodegradability thiab biocompatibility, PLA tau siv dav hauv kev lag luam biomedical thiab kws tshuaj rau ntau xyoo lawm. Hauv kaum xyoo dhau los, daim ntawv thov ntawm PLA raug txwv vim nws cov nqi tsim khoom siab. Yav dhau los, PLA tau tsim los ntawm lactic acid los ntawm txoj kev ncaj qha polycondensation, uas ua rau cov khoom siv tsis zoo thiab qhov hnyav molecular. Txawm li cas los xij, cov kws tshawb fawb tuaj yeem txhim kho cov khoom ntawm PLA tom qab los ntawm kev hloov cov txheej txheem dhau los rau lub nplhaib-qhib polymerization. Cov txheej txheem no yuav tsum muaj cov lactide, uas yog lub cyclic dimers ntawm lactic acid uas ua raws li cov khoom nruab nrab thaum lub sij hawm txheej txheem polymerization.
Daim duab 01: Polylactic Structure
Kev tsim tawm tam sim no ntawm PLA yog pib los ntawm lactic acid tau txais thaum fermentation ntawm carbohydrates xws li cellulose thiab starch. Thaum piv nrog cov roj av polyesters, PLA muaj cov khoom zoo, tshwj xeeb tshaj yog muaj zog hardness, siab elastic modulus, thermoplastic cwj pwm, thiab zoo molding muaj peev xwm. Ntxiv mus, cov khoom ntawm PLA yog superior rau lwm cov biodegradable aliphatic polyesters xws li PBS (polybutylene succinate), PLC (polycaprolactone), thiab PHB (polyhydroxybutyrate). PLA yog siv rau hauv kev lag luam ntim khoom los tsim cov thawv ntim khoom noj uas hnyav thiab pob tshab. PLA zaj duab xis yog siv los ua shrink wraps, lub hnab ntawv qhov rais, laminated coatings, thiab multilayer kev ua tau zoo ntim. PLA kuj tseem siv los tsim cov khoom siv tsis zoo xws li cov khoom siv hluav taws xob, chaw ruaj khov, thiab tshuaj pleev ib ce. Tsis tas li ntawd, cov khoom ua los ntawm fibers thiab foams ntawm PLA kuj muaj nyob rau hauv lub khw.
YABS yog dab tsi?
ABS yog graft copolymer ua los ntawm peb lub monomers: acrylonitrile, butadiene, thiab styrene. Nws yog ib qho zoo tshaj plaws thermoplastics. Nws muab kev sib xyaw ua ke zoo ntawm cov khoom xws li lub zog siab, siab hardness, siab-kub kuj, thiab tseem ceeb tshaj plaws yooj yim ntawm molding. Nyob rau hauv ABS, lub nruam theem muaj styrene thiab acrylonitrile, thaum lub dispersed theem muaj butadiene. Butadiene muab cov khoom zoo heev rau ABS, tab sis tib lub sijhawm, nws txo qis cov khoom siv hluav taws xob ntawm ABS thaum raug tshav kub thiab oxygen mus ntev. Qhov no oxidation yog vim cov residual ob daim ntawv cog lus tam sim no nyob rau hauv polybutadiene.
Daim duab 02: ABC
ABS feem ntau yog siv rau hauv kev siv tsheb xws li pob qhov rooj, lub log npog, daim iav thiab lub teeb taub hau. Tsis tas li ntawd, ABS yog siv los tsim cov tub yees hauv ob sab phlu, cov khoom siv hauv chav ua noj, lub tshuab nqus tsev thiab cov cuab yeej hluav taws xob. ABS yog tsim los ntawm emulsion, loj, thiab ncua kev kawm polymerization txoj kev.
Qhov txawv ntawm PLA thiab ABS yog dab tsi?
PLA vs ABS |
|
| PLA yog biodegradable aliphatic polyester. | ABS yog cov khoom siv tsis yog biodegradable thermoplastic elastomer. |
| tshuaj ntsuab | |
| PLA yog aliphatic polyester. | ABS yog cov khoom siv hluav taws xob. |
| ntau lawm | |
| PLA yog tsim los ntawm lactic acid. | ABS yog tsim los ntawm acrylonitrile, butadiene, thiab styrene. |
| Cross Linkage | |
| PLA yog tsim los ntawm lub nplhaib qhib polymerization. | ABS yog tsim los ntawm emulsion, huab hwm coj thiab ncua kev kawm ntawv polymerization. |
| Nqis tsim tawm | |
| PLA muaj tus nqi sib piv siab ntawm kev tsim khoom rau ABS. | ABS muaj qhov sib piv tus nqi qis ntawm kev tsim khoom. |
| PLA muaj cua sov tsis tshua muaj. | PLA muaj kev kub ntxhov siab. |
| Applications | |
| PLA yog siv rau hauv lub teeb yuag thiab pob tshab ntim khoom ntim, cov khoom siv hluav taws xob, chaw ruaj khov, thiab tshuaj pleev ib ce | ABS yog siv rau hauv kev siv tsheb, khoom siv, vaj tsev ntawm cov khoom siv hauv chav ua noj, cov cuab yeej hluav taws xob, thiab lub tshuab nqus tsev. |
Summary – PLA vs ABS
PLA yog biodegradable thiab biocompatible polymer ua los ntawm lub nplhaib-qhib polymerization ntawm lactic acid nyob rau hauv lub xub ntiag ntawm lactic. Nws qhia tau hais tias siab hardness, siab elastic modulus, thermoplastic cwj pwm, biodegradability thiab zoo molding muaj peev xwm, yog li siv tsuas yog nyob rau hauv ntim thiab tshuaj industries. ABS yog ib qho nyuaj thermoplastic elastomer, uas yog tsim los ntawm acrylonitrile, butadiene, thiab styrene los ntawm emulsion, loj, thiab ncua kev kawm ntawv polymerization cov tswv yim. ABS muaj kev tiv thaiv siab, hluav taws xob zoo, hnav thiab tshuaj lom neeg zoo, yog li siv feem ntau hauv kev lag luam tsheb thiab khoom siv.
Download PDF Version of PLA vs ABS
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv nruab nrab ntawm PLA thiab ABS
