摘要:Several mesomorphic functionalized ladderlike polysiloxanes (LDPS) are presented. They are including: "fishbonelike"liquid crystalline polymers (FBLCPs) containing β - diketone, imine azo - three types of mesogenic side chains and corresponding metal - coordinating LCPs,and chromophore -bearing nonlinear optical (NLO) LDPS. They have been synthesized via hydrosilylation reaction from reactive polyhydro - silsesquioxane or its copolymers and functional monomers. Polymer network liquid crystal (PNLC) composites composed of FBLCP and low mass liquid crystal exhibited interesting electro - optical behavior: "positive" or "negative "effects depending on the "anchoring effect "and elastisity. The poled thin film of ladderlike NLO polymers demonstrated stable poling induced orietation. One of the common morphological feature of these mesomorphic LDPSs is birefrigent light bands which are stable at elevated temperature. Size - controllable cage - like supermolecular self - assemble membrane and its molecular level hybrid with organic molecules is another development based on the "stepwise coupling polymerization".
摘要:The present paper investigated the varied regularities of space group of crystal structure of helix type polymer chains in terms of coloured symmetry theory. The results indicate: (1) For the same polymer,the ordered arrangement of chains must have a space group that is the coloured space group of the discordered arrangement. (2) For the different helix-type polymers, the lower symmetry crystal form must have a space group that is the coloured space group of the higher symmetry form. (3) The direction,path and result of a change from the space group to its coloured space group are given.
Yanhou Geng,Xiabin Jing,Xianhong Wang,Lixiang Wang,Fosong Wang
Vol. 8, Issue 2, Pages: 86-91(1995)
摘要:Several methods (such as in situ polymerization, steric -stabilized colloid dispersion and doping with organic acids) to improve the processability and solubility of polyaniline are reviewed. The progress in this area indicates that the application of polyaniline in industrial scale is becoming reality.
摘要:Principles of molecule design about optical polymer materials are reviewed and discussed in detail. The important properties of some new kinds of optical plastics are introduced with、 37 references.
关键词:Optical polymer;Molecule design;Structrue and property
摘要:This paper presents a new emulsion polymerization method-concentrated emulsion polymerization. It involves a factor of effect on the stability of the concentrated emulsion, Polymerization kinetics, molecular weight and distribution, latex partical size and distribution, permselectivity of the composite polymer film.
摘要:The progress on the crystallization process and kinetics, crystal melting and transformation, properties such as dilute solution property,thermal degradation and dynamic mechanical property of nylon 1010 and its modifications by copolymerization, blending, grafting, filling, reinforcing and cross linking are reviewed.
摘要:The preparation of the polymeric LB films containing photofunctional groups is been presented briefly. Then we review the study on photophysical processes in functional LB films and make some conclusions of the polymer LB films containing Nonlinear Optics Groups. At last,the future application of them is concerned.
关键词:Polymer LB films;Photophysical process;Nonlinear Optics Groups
摘要:In this paper,the electrical conductivity of polysilane and some results of theoretical study on chainlike polysilane's electronic structure are introduced concisely. We also introduced the explanation of the electrical conductivity of this polymer.
关键词:Polysilane;Photoabsorption spectrum;Conduction band;Valence band