魏志勇

个人信息Personal Information

副教授

博士生导师

硕士生导师

主要任职:Null

性别:男

毕业院校:大连理工大学

学位:博士

所在单位:化工学院

学科:高分子材料. 高分子化学与物理

办公地点:西部校区化工实验楼A306

联系方式:13841142437

电子邮箱:zywei@dlut.edu.cn

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Crystallization behavior of poly(epsilon-caprolactone)/Tio2 nanocomposites obtained by in situ polymerization

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论文类型:期刊论文

发表时间:2012-05-01

发表刊物:POLYMER ENGINEERING AND SCIENCE

收录刊物:SCIE、EI、Scopus

卷号:52

期号:5

页面范围:1047-1057

ISSN号:0032-3888

摘要:Poly(?-caprolactone) (PCL)/titanium dioxide (TiO2) nanocomposites were prepared by in situ polymerization of ?-caprolactone in the presence of modified-TiO2 nanoparticles as initiators. The molecular weight of PCL matrix was dependent on the amount of the TiO2 fillers. The incorporation of TiO2 did not significantly affect the crystalline structure of PCL. Moreover, a tendency of the nanoparticles to form aggregates was observed, especially at higher fillers contents. The analysis of the crystallization process showed that the addition of TiO2 nanoparticles accelerated the crystallization rate of PCL, and the crystallization rates increased by increasing the filler content. The crystallization activation energy dependence on the filler content observed here is probably the consequence of the two competing factors. The tendency of activation energy obtained by nonisothermal crystallization is similar to that of isothermal crystallization. POLYM. ENG. SCI., 2012. (C) 2011 Society of Plastics Engineers