[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fyODT-lFvQ4V-LdA8B3C5Zw1diGLvcyrbo45wmPfN8Uc":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":10,"question":17,"related":18,"source":24,"type":25},[],"2024-06-13 23:50:23",151319989,[8,9],"正确","错误",{"count":11,"courseId":12,"courseImg":13,"courseName":14,"workId":15,"workName":16},10,"ca516b2bc583e717814e9798d8c32d33","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fcd8d99523d7ed801bff94b37f86863ed.jpeg","高分子材料基础实训","1cc24c809ada438ba9fcf4e85c91b409","","塑料的流动性好坏,与加工性能关系非常密切",[19,26,31,36,39,44,50,55,60,65],{"answer":20,"createTime":5,"id":21,"options":22,"question":23,"source":24,"type":25},[],151319984,[8,9],"所谓熔融指数(MI)是指热塑性塑料等热塑性材料在一定的温度,一定的压力下,熔体在10分钟内通过标准毛细管的重量","v1",3,{"answer":27,"createTime":5,"id":28,"options":29,"question":30,"source":24,"type":25},[],151319986,[8,9],"熔体的粘度可以用于表征高聚物熔体流动性的好坏",{"answer":32,"createTime":5,"id":33,"options":34,"question":35,"source":24,"type":25},[],151319988,[8,9],"如压制大型或形状复杂的制品时,需要塑料有较好的流动性,测得的熔融指数较小",{"answer":37,"createTime":5,"id":6,"options":38,"question":17,"source":24,"type":25},[],[8,9],{"answer":40,"createTime":5,"id":41,"options":42,"question":43,"source":24,"type":25},[],151319990,[8,9],"熔融指数仪所测量的是熔体经流毛细管的体积流量",{"answer":45,"createTime":46,"id":47,"options":48,"question":49,"source":24,"type":25},[],"2024-06-13 23:50:24",151319991,[8,9],"比较两种聚合物的熔融指数,如果两种聚合物的结构相同,在不同测试条件下得到的数据可以直接比较",{"answer":51,"createTime":46,"id":52,"options":53,"question":54,"source":24,"type":25},[],151319992,[8,9],"如果选用的树脂熔融指数较小,则有可能使塑料溢出模外,造成上下模面发生不必要的粘合或使部件发生阻塞,给脱模和整理工作造成困难,同时还会影响制品尺寸的精密度",{"answer":56,"createTime":46,"id":57,"options":58,"question":59,"source":24,"type":25},[],151319993,[8,9],"可以用熔融指数来比较不同高聚物相对分子质量大小",{"answer":61,"createTime":46,"id":62,"options":63,"question":64,"source":24,"type":25},[],151319994,[8,9],"一般来说,相对分子质量越高,其熔融指数越高",{"answer":66,"createTime":46,"id":67,"options":68,"question":69,"source":24,"type":25},[],151319995,[8,9],"熔融指数可以用作区别各种热塑性材料在熔融状态时的流动性的一个指标"]