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本文报导了第三丁基乙烯基酮在不同溶剂中应用各种负离子引发剂的聚合研究。以正丁基锂为引发剂,吡啶或四氢呋喃为溶剂时,都是均相聚合,得到无定形聚合物,它们的软化温度为40—180°之间,如果以苯、甲苯、二甲苯或正庚烷为溶剂,则都是非均相聚合,得到结晶性聚合物,有着高达260—280°之间的熔点。上述结晶性与无定形聚第三丁基乙烯基酮的红外光谱有着显著的不同,结晶性聚合物具有特征的吸收峯,以1100厘米~(-1)与1330厘米~(_1)二处最为明显。还研究了不同比例的混合物的红外光谱,当结晶性聚合物含量降至 87％以下时,则 1100厘米~(-1) ,1290厘米~(-1)及 1330厘米~(-1)三处吸收峯逐渐减弱,当减少至13％时则与无定形聚合物的光谱一致。此外金属锂、钠与钾都能引发聚合第三丁基乙烯基酮,也试用了NaH,LiAlH_4,RONa,ROK,RMgX,二苯酮以及二苯酮钠等引发剂进行非均相聚合。
This paper reports the polymerization of t-butyl vinyl ketone with various anionic initiators in different solvents. When using n-butyllithium as initiator and pyridine or tetrahydrofuran as solvent, all of them are homogeneously polymerized to obtain amorphous polymers whose softening temperature is between 40 and 180 °. If benzene, toluene, xylene or positive Heptane is used as a solvent, all of which are heterogeneous polymerized to give crystalline polymers with melting points up to 260-280 °. The above crystalline and amorphous polybutyl vinyl ketone infrared spectrum has a significant difference, the crystalline polymer has a characteristic absorption peak to 1100 cm -1 and 1330 cm ~ (_1) two most obvious. Infrared spectra of mixtures with different proportions were also studied. When the content of the crystalline polymer drops below 87%, three points of 1100 cm -1, 1290 cm -1 and 1330 cm -1 The absorption peak diminishes gradually, and when it decreases to 13% it is consistent with the spectrum of the amorphous polymer. In addition, metallic lithium, sodium and potassium all can initiate polymerization of tributyl vinyl ketone, and also heterogeneous polymerization of initiators such as NaH, LiAlH4, RONa, ROK, RMgX, benzophenone and sodium benzophenone were also conducted.