4,4′-二氨基二苯砜共缩聚改性PPTA及性能研究  

Preparation of modified PPTA via copolycondensation with 4,4′-diamino diphenyl sulfone and their performance

作　　者：梁敏思[1] 王洁[1] 曲婷[1] 赵振波[1] 

机构地区：[1]长春工业大学化学与生命科学学院,长春130012

出　　处：《化工新型材料》2017年第5期109-111,共3页New Chemical Materials

摘　　要：芳纶1414(PPTA)以其高强度、高模量、耐化学腐蚀的特性,被广泛应用于航空航天、电器和特种品开发等领域。采用低温溶液缩聚法,在二甲基乙酰胺(DMAC)-氯化锂(LiCl)溶剂体系中引入4,4′-二氨基二苯砜(4,4′-DDS)作为第三单体,对PPTA进行改性。并对改性PPTA进行表征。研究反应温度、LiCl含量以及第三单体含量对共聚物比浓对数黏度的影响。先加入第三单体且添加量为30%(摩尔百分用量),LiCl用量为1.6%(wt,质量分数),第二阶段反应温度为80℃时,制得的改性PPTA比浓对数黏度为2.52mL/g,在氮气气氛下的分解温度为500℃,具有较好的耐高温性能。Aramid fiber 1414（PPTA） due to its high strength,high modulus,resistance to chemical corrosion prop- erties are widely applied in aerospace, electrical appliances and special product development and other fields. Through low temperature solution polycondensation method, used 4,4＇-diamino diphenyl sulfone （4,4＇-DDS） as the third monomer added in DMAC-LiC1 solvent system to modified PPTA. Utilized FT-IR,TGA and solubility test to characterize the modified PP- TA. The effect of reaction temperature, LiC1 and the third monomer addition on copolymer viscosity was studied. As the third monomer＇s adding amount was 30% （the mole percent usage）, LiCl＇s dosage was 1.6 % （wt, mass fraction）, the second stage reaction temperature was 80℃, then got the inherent viscosity of modified PPTA was 2.52mL/g, the decomposition temperature under nitrogen atmosphere was 500℃,the high temperature resistant performance was showed.

关 键 词：芳纶 4 4′-二氨基二苯砜 改性 比浓对数黏度 

分 类 号：TQ342.72[化学工程—化纤工业]