文献类型：期刊文献

英文题名：Phase behavior of ternary systems involving a conformationally variable chain and a randomly coiled polymer: Effect of external orientational field

作者：Lin, Jiaping[1]; Lin, Shaoliang[1]; Chen, Tao[1]; Tian, Xiaohui[1]

机构：[1]E China Univ Sci & Technol, Dept Polymer Sci & Engn, Shanghai 200237, Peoples R China

年份：2004

卷号：37

期号：14

起止页码：5461

外文期刊名：MACROMOLECULES

收录：;EI(收录号：2004328305731);WOS:【SCI-EXPANDED(收录号:WOS:000222571000042)】；

语种：英文

外文关键词：Concentration (process) - Electric fields - Lattice constants - Liquid crystal polymers - Magnetic anisotropy - Molecular structure - Organic solvents - Polarization - Polymers - Polypeptides - Superconducting transition temperature

摘要：The lattice theory regarding ternary systems involving a conformationally variable polypeptide and a randomly coiled polymer presented recently is extended to the case where an external orientational field of quadrupole type is present. The mixing partition function is elaborated by inclusion of the energy term arising from the external field to the lattice scheme previously developed. The calculations carried out show that the external field exerts a marked effect on the phase behavior of the ternary systems. The isotropic-anisotropic biphasic gap is predicted to shift to lower polymer concentrations and becomes narrower when the external field exists. The entrance of the randomly coiled polymers into the anisotropic phase is promoted. Influences of the external field intensity, molecular structure parameters, and compositions have also been studied.