[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fcXMSlIrlmiansCzWYx-C1ONh5Ujv5c7k4DWpROUDCaI":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":17,"related":18,"source":22,"type":23},[],"2023-05-20 16:59:55",20301366,[8,9],"正确","错误",{"count":11,"courseId":12,"courseImg":13,"courseName":14,"workId":15,"workName":16},139,"a38e1f0ab09aeb966c838e864ee183bc","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fdb3a5eb6177bf85ad556cb52c242afa2.jpg","高分子材料科学","ca1b4e95e9c042309bb724cb3a95690f","模块2合集","PMMA的聚合体系中,链增长的每一个步骤中,生成的链自由基都有一定的反应活性,能够捕捉单体继续发生增长分子链",[19,24,29,34,39,44,49,54,59,64],{"answer":20,"createTime":5,"id":6,"options":21,"question":17,"source":22,"type":23},[],[8,9],"v1",3,{"answer":25,"createTime":5,"id":26,"options":27,"question":28,"source":22,"type":23},[],20301367,[8,9],"在本体聚合中,如果散热不好,则可能在制品中产生大量的气泡缺陷",{"answer":30,"createTime":5,"id":31,"options":32,"question":33,"source":22,"type":23},[],20301368,[8,9],"由于本体聚合不容易散热,且反应后期容易发生爆聚,因此最好采取分段聚合的方式进行",{"answer":35,"createTime":5,"id":36,"options":37,"question":38,"source":22,"type":23},[],20301369,[8,9],"本体聚合体系仅有单体和少量(或无)引发剂组成,产物纯净,后处理简单,是比较经济的聚合方法",{"answer":40,"createTime":5,"id":41,"options":42,"question":43,"source":22,"type":23},[],20301370,[8,9],"在PMMA本体聚合中,分子链增长是吸热反应",{"answer":45,"createTime":5,"id":46,"options":47,"question":48,"source":22,"type":23},[],20301371,[8,9],"在PMMA的加聚反应过程中,每一步链增长生成的产物,都是稳定的PMMA长链,不再继续反应",{"answer":50,"createTime":5,"id":51,"options":52,"question":53,"source":22,"type":23},[],20301372,[8,9],"所谓的分段聚合,是指先在较高温度下快速反应至一定程度,停止加热,转移到低温环境中继续慢速反应,这样有利于减慢聚合热的产生,防止爆聚",{"answer":55,"createTime":5,"id":56,"options":57,"question":58,"source":22,"type":23},[],20301373,[8,9],"PMMA聚合中的链引发反应,包含2个步骤,第1步是BPO分解,生成2个初级自由基;第2步是初级自由基与单体发生反应,生成单体自由基",{"answer":60,"createTime":5,"id":61,"options":62,"question":63,"source":22,"type":23},[],20301374,[8,9],"过氧化二苯甲酰可以在受热下发生分解,形成2个初级自由基",{"answer":65,"createTime":5,"id":66,"options":67,"question":68,"source":22,"type":23},[],20301375,[8,9],"PMMA的聚合体系中,只有甲基丙烯酸甲酯和BPO两种原料,BPO在甲基丙烯酸甲酯中,无法溶解,仍然以固体的形式存在"]