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

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.