摘要
采用1,6己二胺(HDA)—对苯二胺(PPDA)—对苯二甲酰氯(TPC))和1,10癸二胺—4,4’-3,3’二甲基联苯二胺(DMBPDA)—2,5二氯代对苯二甲酰氯(DCTPC)两组共缩聚单体体系,以 N-甲基吡咯烷酮—氯化锂为溶剂体系,以吡啶和三乙胺为酸吸收剂的低温溶液共缩聚法,按不同投料方法合成具有不同序列结构的共聚酰胺。序列结构参数是用′H-NMR 和计算机分峰处理程序分析计算的。实验结果表明,单体投料顺序和不同活性的二元胺的用量对共聚酰胺的序列结构有重要影响。在 HDA-PPDA-TPC 体系中,HDA/PPDA(mol)从0.5增加到1.0时,共聚物由基本上是无规共聚物(B(?)1.0)变为基本上是嵌段共聚物(B<0.2);表征两种链节即—TPC—HDA—和—TPC—PPDA—数均序列长度 L_(nH)和 L_(np)也随着HDA/PPDA 的比例增加而增加。在相同的加料比例下,活性较大的脂肪族二胺单体对趋向于形成嵌段共聚物所作的贡献要大些。
In this paper,the sequence structures of two kinds of aromatic-aliphatic co-polyamides,one of which was synthesized from 1,6-hexylenediamide,p-phenylenedi-amine and terephthalyl chloride(HDA-PPDA-TPC),the other was from 1,10-deca-methylene diamine,4,4'-3,3'-dimethylbisphenylenediamine and 2,5-dichloroterephthalylchloride(DMDA-DMBPDA-DCTPC)by low temprature polycondeasation in NMP-LiClsolvent system were studied.The results show that the ratio of two kinds ofdiamine monomers and the feeding order were important factors for the sequencestructures of aromatic-aliphatic copolyamides,In the HDA-PPDA-TPC system,thesequence structures of the copolyamide teands to change from random to block structurewith the increase of the ratio of 1,6-hexylenediamine to p-phenylenediamine from 1/2to 1(mol).The contribution of more active apliphatic diamine was more obviousthan that of aromatic diamiae for the tendency to obtain block sequence copolyamides.
出处
《合成纤维工业》
CAS
CSCD
1990年第3期43-47,共5页
China Synthetic Fiber Industry
