具有周期性共聚单体序列的共聚物

C. Eisenbach, Wolfgang Lieberth, B. Sperlich
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引用次数: 9

摘要

研究了烯烃与丙烯酸单体在酸存在下的自由基共聚和多聚反应。研究发现,与目前专用的路易斯酸相比,布朗斯特酸是一种适合于丙烯酸共聚物的络合剂。Bronsted酸(如羧酸)制备交替共聚物的效率随着pKs值的增加而增加,三氟乙酸被证明是首选酸。氯化锌二乙醚配合物扩展了路易斯酸型络合剂的变化范围,它具有较好的溶解度和可回收性,这也是Bronsted酸的一个特点,优于zncl2或其他路易斯酸
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Copolymers with periodic comonomer sequences
The free radical copolymerization and multipolymerization of olefins with acrylic monomers in the presence of acids has been studied. It was found that Bronsted acids are as suitable complexing agents for the acrylic comonomer as the up to now exclusively used Lewis acids. The effectiveness of the Bronsted acids, e.g. carboxylic acids, for obtaining alternating copolymers increased with the pKs value, and trifluoroacetic acid turned out to be the acid of choice. The variation of the Lewis acid-type complexation agents was extended by the zinc chloride diethylether complex which is advantageous over ZnCl 2 or other Lewis acids because of its good solubility and recycling practically, which is also a feature of the Bronsted acids
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