Synthesis and Characterization of Polyurethane and Epoxy Resin Interpenetrating Polymer Network

A series of Polyurethane (PU)/bisphenol A based Epoxy Resin (EP) Interpenetrating Polymer Networks(IPN) were synthesized and characterized by SEM, DSC, TGA and DMTA. It was found that IPN shows the best compatibility and damping properties when the ratio of PU/EP is 80 to 20. The results show that chain-extender and higher molecular weight of PPG are able to improve the properties of compatibility, damping and thermal properties.     

PREPARATION OF HOLLOW LATEX PARTICLES BY ALKALI-ACID TREATMENT

IntroductionPolymer blends by emulsion polymerizationhave appeared as extremely important materialsand increased attraction for both academic and in-dustrial researchers.These blends rang from com-pletely homogeneous ones to phase- separatedones.Morphological configuration of these poly-mers is a key factor in determining the physicalproperties of the materials[1] . It is important forpreparation of polymer latex particles to controlthe polymer latex particle morphology.Polymer latex particle…     

汽车涂料颜色及其测量控制

针对现代汽车工业的高装饰性要求,浅述了汽车涂料配色和施工过程中经常发生的的颜色问题以及控制方法。颜色基础知识及色差涂料的颜色可由3种属性来表现,即色调(Hue)、明度(Lighting)和饱和度(Chroma)。色调又称色相,是区分不同彩色的视觉属性,体现了颜色在质的方面的关系,如图1色调环所示。它     

Improving the stab-resistance performance of ultra high molecular weight polyethylene fabric intercalated with nano-silica-fluid

High performance fibers impregnated by shear thickening fluids （STFs） have been recognized as a kind of latent stab-resistant materials. In our work, the rheological properties of various nano-silica particles in different carriers were first investigated, some of which showed the typical characteristic of shear thickening phenomena. And then, the effects of add-on and surface hydrophilicity of silica particles, the type and concentration of the carriers were discussed in detail. It was found that the systems of hydrophilic silica in ethylene glycol, butylenes glycol and polyethylene glycol （PEG） demonstrated shear thickening; moreover, the reversibility of rheological behaviors of hydrophilic silica-PEG300 suspensions indicated energy dissipation existed within a circulation of shear stress. Furthermore, the detail mechanism of STF based nano-silica particles was explored and a process diagram was presented. Finally, the stab-resistance and morphology of cutting edge of ultra high molecular weight polyethylene （UHMWPE） fabric impregnated STF composites were investigated and the results were analyzed. The higher silica add-on was benefit to the improvement of the stab resistance of the composites.     

STUDY ON ION-POLYMER INTERACTION AND MORPHOLOGIC STRUCTURE OF POLYURETHANE/SALT SYSTEMS

IntroductionRecently,many chemical and physical scien-tists have focused their investigations on solidpolymer electrolytes(SPE) because of their poten-tial applications in high technology fields,includ-ing high energy- density batteries,electrochromicdevices,chemical sensors,smart windows and soon.It is well known that,many factors,such aschemical structure,salt concentration,tempera-ture,morphologic structure,etc.,would have ef-fect on ionic conductive properties of SPE[1,2 ] .Inorder to ob…