• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polymer bulletin >Blends of a thermotropic liquid crystalline polymer and some flexible chain polymers and the determination of the polymer-polymer interaction parameter of the two polymers
【24h】

Blends of a thermotropic liquid crystalline polymer and some flexible chain polymers and the determination of the polymer-polymer interaction parameter of the two polymers

机译：热致液晶聚合物和某些柔性链状聚合物的共混物以及两种聚合物的聚合物-聚合物相互作用参数的确定

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Blends of a thermotropic liquid crystalline polymer (LCP) with poly(ether imide) (PEI), poly(ether ether ketone) (PEEK), polysulfone (PSF) and polyarylsulfone (PAS) prepared by screw extrusion have been investigated by differential scanning calorimeter and dynamic mechanical thermal analysis. From the measured glass transition temperature (T-g) and specific heat increment (Delta C-p) at the T-g, it appears that the LCP dissolves more in the PEI- and PEEK-rich phases than does the PEI and PEEK in the LCP-rich phase. From the DSC study of PSF-LCP and PAS-LCP blends, the T-g(PSF) and T-g(PAS) of each blends are almost constant with blend composition. Therefore, it is concluded that PSF and PAS are immiscible with LCP. The polymer-polymer interaction parameter (chi(12)) and the degree of disorder (y/x(1)) of LCP have been investigated using the Flory lattice theory in which the anisotropy of LCP is considered. The chi(12) values have been calculated from the T-g data and found to be 0.181+/-0.004 at 593 K for the PEI-LCP blends and 0.069+/-0.006 at 623 K for the PEEK-LCP blends. Using the previously presented method, the chi(12) and y/x(1) in partially miscible systems have been determined. [References: 17]
机译：通过差示扫描量热仪研究了热固性液晶聚合物（LCP）与聚（醚酰亚胺）（PEI），聚（醚醚酮）（PEEK），聚砜（PSF）和聚芳基砜（PAS）的共混物。和动态机械热分析。根据测得的玻璃化转变温度（T-g）和T-g处的比热增量（Delta C-p），似乎LCP在PEI和PEEK富集相中的溶解度比PEI和PEEK在LCP富集相中的溶解度更大。根据对PSF-LCP和PAS-LCP混合物的DSC研究，每种混合物的T-g（PSF）和T-g（PAS）随混合物组成几乎恒定。因此，可以得出结论，PSF和PAS与LCP不相容。已经使用弗洛里晶格理论研究了LCP的聚合物-聚合物相互作用参数（chi（12））和无序度（y / x（1）），其中考虑了LCP的各向异性。从T-g数据计算出chi（12）值，发现PEI-LCP共混物在593 K时为0.181 +/- 0.004，PEEK-LCP共混物在623 K时为0.069 +/- 0.006。使用先前介绍的方法，已经确定了部分可混溶系统中的chi（12）和y / x（1）。 [参考：17]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号