Amphiphilic Networks. I. Network Synthesis by Copolymerization of Methacryloyl-Capped Polyisobutylene with 2-(Dimethylamino) Ethyl Methacrylate and Characterization of The Networks
Amphiphilic Networks. I. Network Synthesis by Copolymerization of Methacryloyl-Capped Polyisobutylene with 2-(Dimethylamino) Ethyl Methacrylate and Characterization of The Networks
复制标题
两亲网络。
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
Anthony J. Allen
中科院分区：
文献类型：
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作者：
Dian Chen;J. Kennedy;Anthony J. Allen
摘要通过疏水性甲基丙烯酰基封端的聚异丁烯（MA-PIB-MA）与亲水性甲基丙烯酸二甲氨基乙酯的自由基共聚，合成了新型两亲性网络。制备了Mn = 4920和10200的两种MA-PIB-MA，并制备了MA-PIB-MA含量在48 - 71.5%之间的两个系列的网络。MA-PIB-MA的分子量及其在网络中的浓度的变化允许在亲水性和疏水性溶剂中的宽范围的机械性能和溶胀性。差示扫描量热法显示在这些网络中存在两个玻璃化转变，从而表明相分离的域结构。拉伸强度和伸长率取决于MA-PIB-MA含量，随着MA-PIB-MA含量的增加，分别从57.7至39.8 kg/cm 2和168至200%变化。随着MA-PIB-MA含量的增加，网络在水中的溶剂溶胀范围从170%到20%，在正庚烷中从40%到170%。
Abstract New amphiphilic networks have been synthesized by free-radical co-polymerization of hydrophobic methacryloyl-capped polyisobutylenes (MA-PIB-MA) with hydrophilic 2-(dimethylamino)ethyl methacrylate. Two MA-PIB-MAs have been prepared with Mn = 4920 and 10 200, and two series of networks were prepared with MA-PIB-MA contents between 48 and 71.5%. Variation of the molecular weight of MA-PIB-MA and its concentration in the network allows for a wide range of mechanical properties and swellability in hydrophilic and hydrophobic solvents. Differential scanning calorimetry shows the existence of two glass transitions in these networks and thus indicates a phase-separated domain structure. Tensile strengths and elongations were dependent on MA-PIB-MA contents varying from 57.7 to 39.8 kg/cm2 and from 168 to 200%, respectively, with increasing MA-PIB-MA content. Solvent swelling of the networks ranged from 170 to 20% in water and from 40 to 170% in n-heptane with increasing MA-PIB-MA contents.