文献类型：期刊文献

英文题名：Effect of pre-existed form I' on the phase transition of isotactic poly-1-butene form III under high pressure CO2

作者：Li, Lei[1]; Liu, Tao[1]; Zhao, Ling[1]

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China

年份：2010

卷号：296

期号：1

起止页码：517

外文期刊名：Macromolecular Symposia

收录：EI(收录号：20105013475958)

语种：英文

外文关键词：Fourier transform infrared spectroscopy - Butenes - Differential scanning calorimetry - High pressure effects - Melting

摘要：The CO2 plasticization effect on the isotactic poly-1-butene (iPB-1) form III with pre-existed minority form I' was investigated by using high-pressure differential scanning calorimetry (DSC). The results showed that the form III melting peak moved to a lower temperature and the melting peak area of form II generated during heating decreased with the increased CO2 pressure. The solid-solid transition of form III to I' in the iPB-1 was mainly studied by fourier transform infrared spectroscopy (FTIR). It was claimed that the phase transition was a thermodynamic process and the pre-existed form I' in form III inhibit the phase transition of form III into I'. The influence of the pre-existed form I' on the melting behavior of the iPB-1 was also studied by DSC. It was found that the form I' also suppressed the recrystallization of form II. Copyright ? 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.