摘要
以双酚Ａ聚砜（ＰＳＦ）为硬段、聚对羟基苯乙烯（ＰＨＳ）为半硬段、聚二甲基硅氧烷（ＰＤＭＳ）为软段合成了三元多嵌段共聚物，并对其动态力学性能和抗张性能进行了比较详细的研究，结果表明该三元多嵌段共聚物为多相结构；在引入半硬段ＰＨＳ后两相间的界面相增宽，粘接力增大，其强度和模量高且稳定，使含有机硅高分子材料强度低的弱点得以改善。扭辩分析（ＴＢＡ）结果显示，这种三元多嵌段共聚物具有多重转变，且在－２０℃至５０℃间有两个较大的几乎重叠的吸收峰；这表明这种三元多嵌段共聚物的相分离结构较为复杂，并有良好的阻尼性能。
he morphology and properties of the segmented ternary copolymers with polydimethylsiloxane(PDMS)as soft segment,polysulfone(PSF)or poly-cardo-ethersulfone(PES-c)as hard segment and poly-p-hydroxystyrene(PHS),phenolic aldebyde(PA),polyhydroxyether(PHE),or polyhydroxyethersulfone(PHES)as semi-hard segment were studied by a varity of techniques. The results showed that the solubility of these copolymers depended on the bonding structure of the semi-hard segment with PDMS.The misibility of the hard segment with semi-hard segment is very important as far as the mechanical properties of the copolymers are concerned.If the hard segment and semi-hard segment are misible,the copolymer will display good dynamic mechanical as well as tensile properties.
出处
《功能高分子学报》
CAS
CSCD
1995年第4期416-424,共9页
Journal of Functional Polymers
关键词
有机硅
多嵌段共聚物
力学性能
PDMS
Segmented ternary copolymer,Hard,semi-hard and soft segment,Misibility
