摘要
利用ＤＳＣ和ＤＭＡ研究了一种新的含有机硅三元多嵌段共聚物ＰＰＯ－ＰＤＭＳ－ＰＨＳ与均聚物ＰＰＯ共混体系的相容性，结果表明，均聚物ＰＰＯ与ＰＰＯ－ＰＤＭＳ－ＰＨＳ中的两种嵌段（ＰＰＯ和ＰＨＳ）有相容性，两种嵌段协同作用的结果提高了共混相容性的临界值，当均聚物ＰＰＯ的Ｍｎ为２００００时，ＰＰＯ嵌段的Ｍｎ为２００００，ＰＨＳ嵌段的Ｍｎ为５１６０时，ＰＰＯ－ＰＤＭＳ－ＰＨＳ／ＰＰＯ共混物为一相容体系。
The compatibility of PO PDMS PHS ?segmented ternary copolymer with homopolymer PPO blends was studied by DSC and DMA. The results show that the homopolymer PPO will form miscible blends with PO PDMS PHS ?even when n of PPO homopolymer is high as that of PPO segment( n=20000) and much higher than that of PHS( n=5160). In this case the ratio of the n of the homopolymer to that of the corresponding segment goes over the limit of that reported in literature for homopolymer/block copolymer blends. However the mechanism of this phenomenon needs further investigation.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1998年第4期65-68,共4页
Polymer Materials Science & Engineering
关键词
嵌段共聚物
均聚物
共混
相容性
高聚物
segmented copolymer, homopolymer, compatibility of blends
