苯乙烯-丙烯酸丁酯-丙烯酸羟乙酯共聚物的合成及其与二异氰酸酯的交联

Synthesis of styrene-butyl acrylate-hydroxyethyl acrylate copolymer and its crosslinking with diisocyanate

当混合溶剂乙酸丁酯／二甲苯质量比为１∶１，过氧化苯甲酰（ＢＰＯ）为１％，苯乙烯（Ｓｔ）／丙烯酸丁酯（ＢＡ）＋丙烯酸羟乙酯（ＨＥＡ）（质量比）为６２∶３８，反应温度为１３３℃时，可获得转化率为９５．３％、［η］为０．１６ｄＬ／ｇ的Ｓｔ－ＢＡ－ＨＥＡ共聚物。该共聚物（ＨＥＡ的结合量为２％～４％）在同一溶剂中加入甲苯二异氰酸酯（ＴＤＩ）或聚醚型二异氰酸酯（ＰＥＤＩ），当—ＮＣＯ／—ＯＨ摩尔比为１．２～１．５∶１，二丁基二月桂酸锡用量为０．３％～１．０％时，可于室温下交联，交联度为５８．３％～５９．１％

The copolymer of styrene-butyl acrylate-hydroxyethyl acrylate was synthesized at conversion of 95.3% and 0.16 dL/g,when butyl acetate/xylene was 11,benzoyl peroxide was 1%,St(BA+HEA) was 6228,and polymerization temperature was 133 .The copolymer(bounded HEA 2%4%) could crosslink with toluene diisocyanate(TDI) and polyether diisocyanate(PEDI)at room temperature.When NCO/OH was 1.21.51,the amount of catalyst was 0.3%1.0%,the crosslinking degree was 58.3%59.1%.