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Chinese Journal of Polymer Science 2016年第12期34卷 1500-1509页

作者： Tanveer ul Haq Zia Ahmad Nawaz Khan Majid Hussain Ibrar Hassan Iftikhar Hussain Gul Department of Materials Engineering School of Chemical and Materials EngineeringNational University of Sciences and Technology

The dielectric and mechanical properties of hybrid polymer nanocomposites of polystyrene.polyaniline/carbon nanotubes coated with polyaniline （pCNTs） have been investigated using impedance analyzer and extensometer. The blends of PS/PANI formed the heterogeneous phase separated morphology in which pCNTs are dispersed uniformly. The incorporation of a small amount of pCNTs into the blend of PS/PANI has remarkably increased the dielectric properties. Similarly, the AC conductivity of PS/PANI is also increased five orders of magnitude from 1.6 × 10^-10 to 2.0×10^-5 ***-1 in the hybrid nanocomposites. Such behavior of hybrid nanocomposites is owing to the interfacial polarization occurring due to the presence of multicomponent domains with varying conductivity character of the phases from insulative PS to poor conductor PANI to highly conductive CNTs. Meanwhile, the tensile modulus and tensile strength are also enhanced significantly up to 55% and 160%, respectively, without much loss of ductility for three phase hybrid nanocomposites as compared to the neat PS. Thereby, the hybrid nanocomposites of PS/PANI/pCNTs become stiffer, stronger and tougher as compared to the neat systems.

关键词： Nanocomposites Carbon nanotubes Dielectric behavior Mechanical properties polystyrene.

Synthesis of 3D ordered porous polystyrene.using silica template

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Chinese Science Bulletin 2001年第4期46卷 306-308页

作者： Jianhua Rong Zhenzhong Yang Kai Qi Xigao Jin Chinese Acad Sci Inst Chem Ctr Mol Sci State Key Lab Polymer Phys & Chem Beijing 100080 Peoples R China

A rigid colloidal silica template was formed by self-assembly of the monodispersed silica spheres prepared according to Stober method. The silica template is highly ordered, which was verified by bright color effect due to Bragg diffraction and the results of SEM. The free radical polymerization of styrene was allowed within the interstices of the rigid template to result in the formation of the three-dimensional periodic silica/polystyrene.nano-composites. The titled porous polystyrene.was prepared by chemical decomposition of the template with concentrated aqueous hydrofluoric acid. Scanning electron microscopy characterization showed that the macroporous polystyrene.has ordered arrays of the uniform pores replicated from the template. Moreover, it was found that the morphology of the as-synthesized macroporous polystyrene.was greatly affected by the connectivity of the silica spheres treated under different conditions.

关键词： template synthesis colloidal silica three-dimensional order macroporous polystyrene.

PREFERENTIAL INTERCALATION BEHAVIOR OF CLAY AND ITS EFFECT ON THE THERMAL DEGRADATION IN IMMISCIBLE PP/PS BLENDS

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Chinese Journal of Polymer Science 2008年第6期26卷 783-792页

作者：方征平 Institute of Polymer Composites Zhejiang UniversityKey Laboratory of Macromolecular Synthesis and FunctionalizationMinistry of Education Department of Biochemical and Chemical Engineering Ningbo Institute of TechnologyZhejiang University

The typical immiscible PP/PS blend based clay nanocomposites were prepared via melt *** dispersion of clay was determined by X-ray diffraction (XRD) and transmission electron microscopy (TEM).Thermal stability and dynamic mechanical properties were measured by thermogravimetrical analysis (TGA) and dynamic mechanical analysis (DMA),*** intercalation behavior of clay in PP/PS blends was *** dispersion of clay is significantly influenced by the polarity of PP and PS,meanwh...

关键词： Clay Nanocomposites Poly(propylene) polystyrene.

SYNDIOSPECIFIC POLYMERIZATION OF STYRENE WITH Ar[O,O/NH]Cp ~*TiCl ACTIVATED WITH MMAO

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Chinese Journal of Polymer Science 2009年第5期27卷 659-665页

作者：陈劼 Haerbin Institute of Technology Postdoctoral Station of School of Materials Science and Engineering Daqing Oilfield Company Ltd. Exploration and Development of Research Institute

A series of titanium complexes Ar[O,E]Cp~*TiCl(Cp~*=C_5Me_5,Ar=1,2-phenylene,E=NH(1a);Ar=1,2- phenylene,E=O(1b);Ar=2.2'-diphenylene,E=O(1c);Ar=2,2'-dinaphthalene,E=O(1d)) has been prepared by the reaction of corresponding phenol derivatives with Cp~*TiCl_3 in the presence of excessive *** the conditions of low Al/Ti molar ratio(e.g.500) and high reaction temperatures(>70℃),all the titanium complexes display higher catalytic activities towards the syndiospecific polymerization of styrene,in t...

关键词： Ziegler-Natta polymerization Catalysts Syndiotactic polystyrene.