Effect of Added Poly (vinyl pyrrolidone) during Condensation on Properties of Poly(p-phenylene terephthalamide)Pulp  

作　　者：李锦春 尤秀兰 曹煜彤 刘兆峰 

机构地区：[1]School of Materials Science and Engineering,Jiangsu Polytechnic University [2]State Key Lab for Modification of Chemical Fibers and Polymer Materials,College of Material Science and Engineering,Donghua University

出　　处：《Journal of Donghua University(English Edition)》2009年第2期147-153,共7页东华大学学报（英文版）

摘　　要：Poly(p-phenylene terephthalamide)(PPTA)pulp was prepared by polycondensation of the p-phenylene diamine(PPDA)with terephthaloyl chloride(TPC)in the completely anhydrous solvent system of N-methyl pyrrolidone(NMP)having calcium chloride,in the presence of poly(vinyl pyrrolidone)(PVP)having a viscosity average molecular weight lower than 40 000.It was confirmed that the polycondensation could be accelerated,the inherent viscosity of the polymer could be increased,and the polymers could be fibrillated more easily by the addition of the PVP.FTIR and X-ray spectra proved that PVP had not combined into molecular chains of the resultant PPTA pulps.The morphology of the resultant pulps,the effect of viscosity average molecular weight,amount and adding mode of PVP on inherent viscosity,specific surface area,and mean length of the resultant pulps were discussed in detail.And the friction and wear properties of the compound reinforced by the resultant pulps were simply investigated.Poly（p-phenylene terephthalamide）（PPTA）pulp was prepared by polycondensation of the p-phenylene diamine（PPDA）with terephthaloyl chloride（TPC）in the completely anhydrous solvent system of N-methyl pyrrolidone（NMP）having calcium chloride,in the presence of poly（vinyl pyrrolidone）（PVP）having a viscosity average molecular weight lower than 40 000.It was confirmed that the polycondensation could be accelerated,the inherent viscosity of the polymer could be increased,and the polymers could be fibrillated more easily by the addition of the PVP.FTIR and X-ray spectra proved that PVP had not combined into molecular chains of the resultant PPTA pulps.The morphology of the resultant pulps,the effect of viscosity average molecular weight,amount and adding mode of PVP on inherent viscosity,specific surface area,and mean length of the resultant pulps were discussed in detail.And the friction and wear properties of the compound reinforced by the resultant pulps were simply investigated.

关 键 词：poly （ p-phenylene terephthalamide ） pulp PPTA pulp ） poly （vinyl pyrrolidone ） （ PVP ） POLYCONDENSATION friction material 

分 类 号：TQ326.6[化学工程—合成树脂塑料工业] TQ246.31