文献类型：期刊文献

中文题名：高压CO_2对聚丙烯溶胀行为的影响

英文题名：INFLUENCE OF SWELLING BY HIGH PRESSURE CO_2 ON POLYPROPYLENE

作者：刘颋[1];曹贵平[1];刘涛[1];赵玲[1];许志美[1];袁渭康[1]

机构：[1]华东理工大学国家重点化学工程实验室,上海200237

年份：2005

卷号：21

期号：6

起止页码：130

中文期刊名：高分子材料科学与工程

外文期刊名：Polymer Materials Science & Engineering

收录：CSTPCD;;EI(收录号：2005529617714);Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：国家重大自然科学基金资助(20490200)

语种：中文

中文关键词：超临界;聚丙烯;溶胀;高压示差扫描量热仪;SEM

外文关键词：supercritical; polypropylene; swelling; HP DSC; SEM

摘要：高压CO2对聚丙烯具有塑化作用.高压DSC分析表明,随着压力的升高,聚丙烯熔点和熔融焓不断下降,在0～6 MPa范围内熔点下降速率约为0.128 ℃/0.1 MPa.由于受到高压CO2的溶胀作用影响的差异,SEM显示iPP在形貌上未发生明显变化,而rPP则变化明显,甚至因为发泡产生了纳米微孔.
Compressed CO2 has a plasticization effect on polymers such as polypropylene （PP）. A high pressure differential scanning calorimeter （HP DSC） was employed to evaluate the melting behavior of PP. The results show that the melting point and the melting enthalpy are decreased with the increase of the gas pressure due to plasticization of SC CO2. At the range of 0～6×10^6 Pa, the melting point of PP has a good linear relationship with the SC CO2. and the decreasing rate is 0. 128 ℃/0. 1 MPa. The swelling influences on the morphology of iPP and rPP are different at lower temperature. SEM photographing shows that the change is not obvious in iPP morphology while the change in rPP morphology is so great that nano holes are created due to bubbling.