ICCAS OpenIR
Study of the thermal stabilization mechanism of biodegradable poly(L-lactide)/silica nanocomposites
Wen, Xin1; Zhang, Kunyu1; Wang, Yan2; Han, Lijing1; Han, Changyu1; Zhang, Huiliang1; Chen, Shan2; Dong, Lisong1
2011-02-01
Source PublicationPOLYMER INTERNATIONAL
ISSN0959-8103
Volume60Issue:2Pages:202-210
AbstractBiodegradable poly(L-lactide) (PLA)/silica (SiO(2)) nanocomposites were prepared by melt compounding to investigate the effect of spherical nanofillers on the thermal stability of PLA. The nanocomposites displayed improved thermal stability both under nitrogen and in air. The stabilization mechanism was attributed mainly to the barrier effect of the network formed, which was demonstrated by the improved barrier properties and rheological performance. The dispersion of nanofiller and matrix-nanoparticle interactions were investigated to evaluate the dependence of the network on SiO(2) loadings. Fourier transform infrared spectroscopy and thermogravimetric analysis indicated that hydroxyl groups on SiO(2) surfaces and PLA chain-ends reacted during melt processing. The resulting grafted SiO(2) and entangled PLA chains formed a dense network, which hindered the diffusion of oxygen and volatile decomposition products. Furthermore, the improvement in thermal stability resulted from the restraining effect on the mobility of active hydroxyl end-groups, so that some related thermal decomposition reactions were inhibited, which was confirmed from gel permeation chromatography measurements. (C) 2010 Society of Chemical Industry
KeywordPoly(L-lactide) Silica Nanocomposites Thermal Stability Thermal Degradation
DOI10.1002/pi.2927
Indexed BySCI
Language英语
WOS IDWOS:000287058300006
PublisherJOHN WILEY & SONS LTD
Citation statistics
Cited Times:42[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/71288
Collection中国科学院化学研究所
Corresponding AuthorDong, Lisong
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.NE Normal Univ, Coll Life, Changchun 130024, Peoples R China
Recommended Citation
GB/T 7714
Wen, Xin,Zhang, Kunyu,Wang, Yan,et al. Study of the thermal stabilization mechanism of biodegradable poly(L-lactide)/silica nanocomposites[J]. POLYMER INTERNATIONAL,2011,60(2):202-210.
APA Wen, Xin.,Zhang, Kunyu.,Wang, Yan.,Han, Lijing.,Han, Changyu.,...&Dong, Lisong.(2011).Study of the thermal stabilization mechanism of biodegradable poly(L-lactide)/silica nanocomposites.POLYMER INTERNATIONAL,60(2),202-210.
MLA Wen, Xin,et al."Study of the thermal stabilization mechanism of biodegradable poly(L-lactide)/silica nanocomposites".POLYMER INTERNATIONAL 60.2(2011):202-210.
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