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首页> 外文期刊>Journal of Applied Polymer Science >Formation of poly(methyl methacrylate) with novel solubility characters in the photopolymerization with bis(cyclopentadienyl)titanium dichloride in a water-methanol mixture
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Formation of poly(methyl methacrylate) with novel solubility characters in the photopolymerization with bis(cyclopentadienyl)titanium dichloride in a water-methanol mixture

机译：在水-甲醇混合物中与双（环戊二烯基）二氯化钛光聚合中具有新颖溶解性的聚甲基丙烯酸甲酯的形成

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摘要

Methyl methacrylate (MMA) was observed to be easily polymerized in the photopolymerization with bis(cyclopentadienyl) titanium dichloride (Cp2TiCl2) in a water-methanol mixture under irradiation of a 15-W fluorescent room lamp. The polymerization proceeded heterogeneously. The rate (R-p) of heterogeneous photopolymerization in a 1 : 1 (v/v) water-methanol mixture at 40 degrees C was apparently given by R-p = k[Cp2TiCl2](0.2)[MMA](2.4). The resulting poly(MMA) was found to contain a tetrahydrofuran (THF)-insoluble part. The separated THF-insoluble part differed significantly from the usual radical poly(MMA) in solubility characters. It is of great interest that the THF-insoluble poly(MMA) was soluble in benzene and toluene, but insoluble in polar solvents, such as ethyl acetate, acetone, methyl ethyl ketone, dimethylformamide, and dimethylsulfoxide. The copolymerization results of MMA and acrylonitrile revealed that the present photopolymerization initiated with Cp2TiCl2 proceeds via a radical mechanism. (C) 1998 John Wiley & Sons, Inc. [References: 22]
机译：在15W荧光室内灯的照射下，观察到甲基丙烯酸甲酯（MMA）在水-甲醇混合物中与双（环戊二烯基）二氯化钛（Cp2TiCl2）发生光聚合时很容易聚合。聚合反应非均相进行。显然，R-p = k [Cp2TiCl2]（0.2）[MMA]（2.4）给出了40℃下1：1（v / v）水-甲醇混合物中非均相光聚合的速率（R-p）。发现所得的聚（MMA）包含不溶于四氢呋喃（THF）的部分。分离的THF不溶部分的溶解度特征与常规的自由基聚（MMA）明显不同。令人关注的是，THF不溶性聚（MMA）可溶于苯和甲苯，但不溶于极性溶剂，例如乙酸乙酯，丙酮，甲乙酮，二甲基甲酰胺和二甲基亚砜。 MMA和丙烯腈的共聚结果表明，由Cp2TiCl2引发的本光聚合反应是通过自由基机理进行的。 （C）1998 John Wiley＆Sons，Inc. [参考：22]

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