RIM-PUR/PS间充复合弹性体的结构与性能研究

STRUCTURE AND PROPERTIES OF IP PUR/PS(RIM) ELASTOMERS

报导了采用反应注射成型制备ＰＵＲ／ＰＳ间充复合弹性体，并通过ＩＲ、ＤＳＣ、ＳＥＭ研究了该材料的氢键作用及其相态结构。结果表明，所得制品呈较理想的多相微区结构，各相之间存在部分互溶，ＰＵＲ仍保持较强的氢键作用。由此提出了该材料的相态结构模型，并推知软段的柔顺性为材料提供了优良的高弹性能而材料的高强度则源于硬段微区及ＰＳ微粒的自增强作用以及ＰＵＲ强的氢键作用。

IP PUR/PS elastomers were prepared by reaction injection molding. Hydrogen bonding and microphsae structure of this materials were studied by means of IR, DSC, SEM. The result shows the elastomers manufactured by this method are multiphase domain structure, partly soluble in separate phases; hydrogen bonding still largely remains in PUR through interstitial polymerization. The flexibility of the soft segment offers excellent elasticity to the blends, meanwhile, the excellent mechanical strength is largely due to self reinforcing of the hard segment domains and the microparticles of PS, which also enhanced by the hydrogen bonding in PUR.