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Deng Yuan and Wang Xueqin(Fiber Material Laboratory,Research Institute,Yizheng Chemical Fiber Comples,Jiangsu)  
Solid state polycondenstation(SSP) of Poly (1,4-butylene terephthalate)(PBT)is carried out by heating the solid PBT below its crystalline melting point, but above its glass transition temperature in vaccum.The kinetics of SSP were investigated at a variety of conditions.Specific reaction activation energy also obtained.All of the result show that there are two factors which affect the increasing speed of PBT molecule chain:diffusion and chemical reaction.At lower temperature, total speed of PBT reaction be controlled mostly by chemical reactin.Then,at higher temperature,mostiy by the diffusion,the increasing-curve deviates second-order reaction equation.The PBT samples obtained by SSP were measured.Molecular weitht distribution,melt peak,crystallinity and crystallite size also were studied.
【CateGory Index】: O633.14
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