摘要
用磷酰化反应合成了具有刚性及柔性链段的六种向列中介相嵌段共聚物:PBA/PPD-4,PBA/PPD-6,PBA/PPD-8,,PPTA/PPD-4,PPTA/PPD-6及 PPTA/PPD-8.嵌段共聚物的比浓对数粘度及耐热性与柔性链的长度有关.PBA/柔性链嵌段共聚物在二甲基乙酰胺-3%氯化锂溶液中的液晶性能及溶解性受柔性链长及其在嵌段共聚物中的组分影响.而PPTA 的嵌段共聚物仅能在浓硫酸中显示液晶态。
Six kinds of nematic mesophase block copolymers with rigid and flexible chain segments:PBA/PPD-4,PBA/PPD-6,PBA/PPD-8,PPTA/PPD-4,PPTA/PPD-6 andPPTA/PPD-8 were prepared through phospho-rylation reaction.The logarithmicviscosity number of the block copolymers and their thermal resistance depend on thelength of flexible chain to some extent.The mesomorphic behavior and solubilityof PBA/block copolymers dissolved in N,N-dimethylacetamide containing 3% LiClsolution have something to do with the length of flexible chain and the componentof the block copolymers,but PPTA series block copolymers can show their mesomo-rphic state only in case dissolved in concentrated sulphuric acid
出处
《合成纤维工业》
CAS
CSCD
1990年第4期31-34,共4页
China Synthetic Fiber Industry
