| 聚氨酯／聚（苯乙烯－甲基丙烯酸甲酯－甲基丙烯酸）互穿聚合物网络的研究 |
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| 引用本文： | 邢佩祥,王静媛,李玉玮,杨松茹,汤心颐.聚氨酯／聚（苯乙烯－甲基丙烯酸甲酯－甲基丙烯酸）互穿聚合物网络的研究[J].应用化学,1996(5). |
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| 作者姓名： | 邢佩祥 王静媛 李玉玮 杨松茹 汤心颐 |
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| 作者单位： | 吉林大学化学系 |
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| 摘 要： | 研究了（蓖麻油－聚乙二醇）聚氨酯／聚（苯乙烯－甲基丙烯酸甲酯－甲基丙烯酸）（ＰＵ／Ｐ（Ｓｔ－ＭＭＡ－ＭＡＡ））互穿聚合物网络（ＩＰＮ）．动态力学性能及透射电镜结果均表明该体系相分离较严重；ＩＰＮ具有两个玻璃化转变温度，它们有不同程度的内移，形成一定程度分子水平的混合，而ＩＰＮ（５０／５０）其分子混合水平较大，互穿缠结程度较高。形成ＩＰＮ后，其力学性能得以改善。透射电镜结果表明，聚氨酯网的交联密度直接影响ＩＰＮ的相区尺寸。形成ＩＰＮ后热稳定性提高，易于降解断链的Ｓｔ－ＭＭＡ－ＭＡＡ单体起到了自由基消除剂的作用。
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| 关 键 词： | 互穿聚合物网络，动态力学谱，聚氨酯，相态 |
Investigation on Polyurethane/Ploy(Styrene-Methyl Methacrylate-Methacrylic Acid) Interpenetrating Polymer Networks |
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| Xing Peixiang, Wang Jingyuan, Li Yuwei, Yang Shongru, Tang Xinyi.Investigation on Polyurethane/Ploy(Styrene-Methyl Methacrylate-Methacrylic Acid) Interpenetrating Polymer Networks[J].Chinese Journal of Applied Chemistry,1996(5). |
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| Authors: | Xing Peixiang Wang Jingyuan Li Yuwei Yang Shongru Tang Xinyi |
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| Abstract: | A series of polyurethanes and poly(styrene-methyl methacrylate-methacrylic acid) interpenetrating polymer networks(IPNs) were characterized using stress-strain analysis,dynamic mechanical spectroscopy, transmission electron microscopy and thermal behavior measurements. The results of dynamic mechanical behavior and morphology show that the phase separation of the IPNs is serious.The IPNs have two Tg values with different extent of shift, indicating the mixing of two components in some extent. The formation of IPNs has improved their mechanical properties. It is suggested that the Si-MMA-MAA segments act as radical scavengers in the polyurethane degradation. |
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| Keywords: | interpenetrating polymer network dynamic mechanical spectrum polyurethane morphology |
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