Dynamic mechanical and thermal properties of plasticized poly(lactic acid)


Autoria(s): Ren ZJ; Dong LS; Yang YM
Data(s)

2006

Resumo

The blends of low molecular weight triacetin (TAC) and oligomeric poly(1,3-butylene glycol adipate) (PBGA) were used as multiple plasticizers to lubricate poly(lactic acid) (PLA) in this study. The thermal and mechanical properties of plasticized polymers were investigated by means of dynamic mechanical analysis and differential scanning calorimetry. Atomic force microscopy (AFM) was used to analyze the morphologies of the blends. Multiple plasticizers were effective in lowering the glass transition temperature (T-g) and the melting temperature (T-m) of PLA. Moreover, crystallinity of PLA increased with increasing the con-tent of multiple plasticizers. Tensile strength of the blends decreased following the increasing of the plasticizers, but increased in elongation at break. AFM topographic images showed that the multiple plasticizers dispersed between interfibrillar regions. Moreover, the fibrillar crystallite formed the quasicrosslinkings, which is another cause for the increase in elongation at break.

Identificador

http://ir.ciac.jl.cn/handle/322003/16705

http://www.irgrid.ac.cn/handle/1471x/152416

Idioma(s)

英语

Fonte

Ren ZJ;Dong LS;Yang YM.Dynamic mechanical and thermal properties of plasticized poly(lactic acid),JOURNAL OF APPLIED POLYMER SCIENCE ,2006,101(3):1583-1590

Palavras-Chave #LACTIC-ACID #POLY(L-LACTIC ACID) #TRIBLOCK COPOLYMERS #POLYESTER BLENDS #CRYSTALLIZATION #COMPATIBILITY #MISCIBILITY #POLYMERS #CITRATE #FILM
Tipo

期刊论文