聚醚型聚氨酯/乙烯基酯树脂互穿聚合物网络结构的研究  

INVESTIGATION ON POLYURETHANE/VINYL ESTER RESIN INTERPENETRATING POLYMER NETWORKS′ STRUCTURES

作　　者：万勇军[1] 谢美丽[1] 顾宜[1] 欧阳庆 刘小平[2] 陆雯[2] 王建华[2] 

机构地区：[1]四川大学高分子材料科学与工程系 [2]中国工程物理研究院化工材料研究所,四川成都610003

出　　处：《高分子材料科学与工程》1999年第6期135-137,14,共4页Polymer Materials Science & Engineering

基　　金：中国工程物理研究院院外基金

摘　　要：以聚氨酯（ＰＵ）为组分Ⅰ、乙烯基酯树脂（ＶＥＲ）为组分Ⅱ，采用二步法制备了聚氨酯／乙烯基酯树脂互穿聚合物网络（ＰＵ／ＶＥＲ－ＩＰＮ），采用透射电镜（ＴＥＭ）和原子力显微镜观察了ＰＵ／ＶＥＲ－ＩＰＮ的微观形态，用调制ＤＳＣ（Ｍ－ＤＳＣＴＭ ）、动态力学分析方法（ＤＭＡ）研究了ＩＰＮ 的玻璃化转变行为及动态力学性能。结果表明，ＰＵ 网络与ＶＥＲ网络形成了多相微区结构，在界面处互穿和缠结，形成类似胞状的结构，ＰＵ 相为胞壁，ＶＥＲ为胞体。在ＰＵ 和ＶＥＲ之间，次级作用明显加强，出现氢键吸收峰，并且出现宽温度阻尼范围。当ＰＵ／ＶＥＲ＝ ４０／６０ 时。A series of polyurethane/vinyl ester resin interpenetrating polymer networks(PU/VER IPN) were prepared by two step polymerization, which was polyurethane(PU) as network Ⅰ and vinyl ester resin(VER) as network Ⅱ. PU/VER IPN samples was tested and characterized by TEM, AFM, M DSC TM , DMA and shearing strength. It is found that a multiphase tiny region structure is formed in PU/VER IPN system. Interpenetrating and entanglement between PU and VER exist in two phase interface and make interfacial adhesive strength higher. Cell domain structure is formed, in which PU phase is cell wall and VER phase is cell body. Some fine cell structures in VER phase also exist. Two phase continuous structures is formed at PU/VER=40/60. The secondary transition between the glass transition of PU and that of VER is inhanced. So the glass transition range is very broad. The interpenetrating and entanglement is more perfect between PU and VER at PU/VER=40/60, and the PU/VER IPN has the best damping property in broad temperature range.

关 键 词：聚氨酯 乙烯基酯树脂 互穿聚合物网络 结构 

分 类 号：O631.1[理学—高分子化学] TQ317[理学—化学]