Degradation of Poly(L-lactide) Films under Ultraviolet Irradiation and Water Bath

被引：19
|
作者：
Zhang, Chunmei [1 ]
Man, Changzhen [1 ]
Wang, Weiwei [1 ]
Jiang, Long [1 ]
Dan, Yi [1 ]
机构：
[1] Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn China, Chengdu 610065, Peoples R China
来源：
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING | 2011年 / 50卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Biodegradable polymers; Limiting viscosity; Poly(L-lactide); Ultraviolet irradiation; POLY-L-LACTIDE; POLY(LACTIC ACID); IN-VITRO; HYDROLYTIC DEGRADATION; EPSILON-CAPROLACTONE; BLEND FILMS; POLYLACTIDE; POLY(EPSILON-CAPROLACTONE); CRYSTALLINE; MORPHOLOGY;
D O I：
10.1080/03602559.2011.551970
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly(L-lactide) (PLLA) films were exposed to ultraviolet (UV) light (254nm) and water bath of 60 degrees C and 80 degrees C. The limiting viscosity ([]) of PLLA decreased from initial 187.4 dl/g to 42.2 dl/g after UV irradiation, and to 33.3 dl/g after soaking in 80 degrees C water for 40h, while the [] of PLLA exposed to 60 degrees C water remained at 115.6 dl/g after 40h. Compared with the original PLLA, the degraded PLLA was bimodal in the GPC profile. FTIR analysis showed that the chain scission of PLLA acted by water molecules resulted in a C=C structure.
引用
收藏
页码：810 / 817
页数：8
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