摘要
以己二胺 ( HDA)、间苯二胺 ( MPD)、 4 ,4 -二氨基二苯醚、 4 ,4 -二氨基二苯甲烷、 4 ,4 -二氨基二苯砜及 2 ,4 -甲苯二异氰酸酯为原料 ,合成了一系列三元共聚脲 ,以三元共聚序列结构分析的理论为基础 ,建立了一套普适性较强的利用核磁氢谱分析和计算机分峰处理 ,研究三元共聚脲在不同反应条件下的序列结构方法 ,计算了无规度 B值和链段序列长度 Lna与 Lnb.定量关联了不同反应条件下二胺单体间的反应活性比 .结果表明 。
A series of copolyureas were synthesized by using 1,6 hexanediamine(HAD), m phenylenediamine(MPD), 4 aminophenyl ether(DDE), 4,4 diaminodiphenyl methane(DDM), 4,4 diaminediphenyl sulfone(DDS) and 2,4 tolyene diisocyanate(TDI). Based on the theory of sequence distribution of copolymers, a method was established which determined the sequence distribution parameters: random degree B and number average sequence length L na and L nb by 1H NMR spectra and a computer program for the resolution of overlapping peaks. And the reactivity ratio of diamines with 2,4 TDI was obtained based on the data. The result was that the diamine reactivity ratio changed in different reacting conditions.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第9期1587-1591,共5页
Chemical Journal of Chinese Universities
