Kinetics of Water Absorption and Thermal Properties of Poly(lactic acid)/Organomontmorillonite/Poly(ethylene glycol) Nanocomposites

被引：32
|
作者：
Leu, Ying Ying [1 ]
Chow, Wen Shyang [1 ]
机构：
[1] Univ Sains Malaysia, Sch Mat & Mineral Resources Engn, Nibong Tebal 14300, Pulau Pinang, Malaysia
来源：
JOURNAL OF VINYL & ADDITIVE TECHNOLOGY | 2011年 / 17卷 / 01期
关键词：
PLASTICIZED POLY(L-LACTIDE); ACID);
D O I：
10.1002/vnl.20259
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Poly(lactic acid) (PLA)/organomontmorillonite (OMMT) nanocomposites were prepared by a melt intercalation technique. The effects of OMMT and poly(ethylene glycol) (PEG) on the thermal properties and water absorption behavior of PLA were investigated. The melting temperature and degree of crystallinity were comparable for the PLA and its nanocomposites. The glass transition temperature and crystallization temperature of PLA were decreased by the addition of PEG. X-ray diffraction results revealed the formation of PLA nanocomposites, as the OMMT was partly intercalated and partly exfoliated. The maximum moisture absorption of PLA was increased in the presence of PEG and the diffusivity of the PLA nanocomposites decreased with increasing concentrations of PEG. However, the activation energy of the nanocomposites increased as the loading of PEG increased. These results indicated that the incorporation of OMMT and PEG enhanced the water-barrier properties of the PLA. J. VINYL ADDIT. TECHNOL., 17:40-47, 2011. (C) 2011 Society of Plastics Engineers
引用
收藏
页码：40 / 47
页数：8
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