PPTA短切纤维/共聚改性PPTA沉析纤维复合纸的制备及其性能研究  

Preparation and Properties of PPTA Chopped Fibers/Copolymerized Modified PPTA Precipitated Fibers Composite Paper

作　　者：谢平 赵开荣 胡祖明[1,2] 于俊荣[1,2] 王彦[1,2] 李娜 XIE Ping;ZHAO Kairong;HU Zuming;YU Junrong;WANG Yan;LI Na(College of Materials Science and Engineering,Donghua University,Shanghai,201620;State Key Lab for Modification of Chemical Fibers and Polymer Materials,Donghua University,Shanghai,201620;Sinochem High Performance Fiber Materials Co.,Ltd.,Yangzhou,Jiangsu Province,211417)

机构地区：[1]东华大学材料科学与工程学院,上海201620 [2]东华大学纤维材料改性国家重点实验室,上海201620 [3]中化高性能纤维材料有限公司,江苏扬州211417

出　　处：《中国造纸学报》2024年第3期96-104,共9页Transactions of China Pulp and Paper

基　　金：国家重点研发计划项目(2021YFB3700101)。

摘　　要：采用共聚策略,在聚对苯二甲酰对苯二胺(PPTA)分子链中引入含有间位结构的间苯二胺(MPD),通过低温溶液缩聚,制备了共聚改性PPTA (MPPTA),利用沉析法得到MPPTA沉析纤维(pMPPTA)。将pMPPTA与PPTA短切纤维(cPPTA)混合后,通过湿法抄造和热压成形制备cPPTA/pMPPTA复合纸,探究了纸张定量及pMPPTA含量对cPPTA/pMPPTA复合纸性能的影响。结果表明,纸张定量及pMPPTA含量对复合纸微观结构影响显著。当纸张定量为90 g/m^(2)及pMPPTA质量分数为60%时,cPPTA/pMPPTA复合纸的力学性能和介电性能较PPTA原纸显著提高,拉伸强度达32.27 MPa。M-phenylenediamine(MPD)with meta structure was introduced into the poly-p-phenylene terephthamide(PPTA)molecular chain via copolymerization strategy.The copolymerized modified PPTA(MPPTA)was prepared by low temperature solution copolymerization.Then MPPTA precipitated fibers(pMPPTA)were obtained by precipitation method.cPPTA/pMPPTA composite paper was prepared by combining pMPPTA with PPTA chopped fibers(cPPTA)via wet forming process.The effects of basis weight and pMPPTA dosage on the properties of cPPTA/pMPPTA composite paper were investigated.The results showed that basis weight and pMPPTA dosage had a significant influence on the microstructure of the composite paper.When the basis weight of cPPTA/pMPPTA composite paper was 90 g/m^(2) and the mass fraction of pMPPTA was 60%,the mechanical and dielectric properties of cPPTA/pMPPTA composite paper were significantly higher than those of PPTA original paper,and the tensile strength reached 32.27 MPa.

关 键 词：PPTA 共聚改性 沉析纤维 短切纤维 复合纸 

分 类 号：TB332[一般工业技术—材料科学与工程]