摘要
改变聚（甲基丙烯酸甲酯－苯乙烯）（Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）中甲基丙烯酸甲酯的含量（Ｗ_（ＭＭＡ）），通过一步法合成出聚环氧氯丙烷聚氨酯（ＰＵ（ＰＥＣＨ）／Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）ＩＰＮ．ＤＳＣ、ＴＥＭ和动态粘弹谱研究结果表明：当Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）中Ｗ_（ＭＭＡ）大于０．６时，ＩＰＮ仅有一个Ｔｇ；当Ｗ_（ＭＭＡ）小于０．４时，ＩＰＮ有２个Ｔ_ｇ，ＴＥＭ上出现相区，Ｐ（ＭＭＡ－ｃｏ－Ｓｔ）溶度参数（δ）及δ的氢键作用分量（δｈ）与相态、力学性能有密切关系。
Interpenetrating polymer networks of polyepichlorohydrin-based polyurethane/ploy(MMA-co-St)have been prepared with simultaneous method by changing the weight fraction of MMA(WMMA)in copolymer of MMA with styrene. The IPNs have been studiedby DSC,TEM and dynamic mechanical spectroscopy(DMS).The results show that the IP-Ns have only one Tg when WMMA is greater than 0.6. But when WMMA is less than 0.4, theIPNs have two Tgs, and phase separation is observed on TEM. The phenomenon is ex-plained according to the solubility parameters(δ)and the fraction of hydrogen bond(δ) of P(MMA-co-St).The study reveals that there is a close correlation among the δ,domain sizeand mechanical properties of PU(PECH)/P(MMA-co-St)IPN.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1995年第10期1637-1640,共4页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
关键词
聚氨酯
甲基丙烯酸甲酯
苯乙烯
IPN
力学性能
Interpenetrating polymer networkes,Polyurethane, Poly(MMA-co-St),T_g,Morphology
