文献类型：期刊文献

英文题名：Non-isothermal crystallisation kinetics of self-assembled polyvinylalcohol/silica nano-composite

作者：Peng, Zheng[1]; Kong, L.X.[1]; Li, Si-Dong[2]

机构：[1]Univ S Australia, Ctr Adv Mfg Res, Mawson Lakes, SA 5095, Australia;[2]Zhanjiang Ocean Univ, Coll Sci, Zhanjiang 524088, Peoples R China

年份：2005

卷号：46

期号：6

起止页码：1949

外文期刊名：POLYMER

收录：SCI-EXPANDED(收录号：WOS:000227246200029)、、EI(收录号：2005098861034)、Scopus(收录号：2-s2.0-13844255769)、WOS

基金：The authors would like to acknowledge Dr P. Spiridonov at University of South Australia for his helpful comments. The project has been supported by UniSA Emerging Thematic Priority Fund and UniSA University President Scholarship.

语种：英文

外文关键词：polyvinylalcohol; nano-composite; nonisothermal crystallisation

外文摘要：A novel polyvinylalcohol/silica (PVA/SiO2) nano-composite is prepared with the self-assembly monolayer (SAM) technique. The SiO2 nano-particles are homogenously distributed throughout the PVA matrixes as nano-clusters with an average diameter ranged from 15 to 240 run depending on the SiO2 contents. Using differential scanning calorimetry (DSC), the non-isothermal crystallisation behaviour and kinetics of the PVA/SiO2 nano-composites are investigated and compared to those of the pure PVA. There are strong dependences of the degree of crystallinity (X-c), peak crystallisation temperature (T-p), half time of crystallisation (t(1/2)), and Ozawa exponent (m) on the SiO2 content and cooling rate. The crystallisation activation energy (E) calculated with the Kissinger model is markedly lower when a small amount of SiO2 is added, then gradually increases and finally becomes higher than that of the pure PVA when there is more than 10% SiO2 in the composite. (C) 2004 Elsevier Ltd. All rights reserved.