PE,全名为Polyethylene,是结构最简单的高分子有机化合物,当今世界应用最广泛的高分子材料,由乙烯聚合而成,根据密度的不同分为高密度聚乙烯、中密度聚乙烯和低密度聚乙烯。聚乙烯(PE)应用:保鲜膜、背心式塑料袋、塑料食品袋、奶瓶、提桶、水壶等。特性:PE比较软,摸起来有蜡质感,与同等塑料相比质量比较轻,有一定的透明性,燃烧时火焰呈蓝色。
PE材质的物品存在于我们的生活及工业环境中,例如:使用再生胶与PE制备橡塑共混材料,橡胶制品厂家可以通过在配方中添加软化剂、填充油等降低黏度,或是使用炭黑等补强剂、填充剂增加黏度,通过试验获得一个比较合适的共混时间、温度参数,提高橡塑共混材料综合指标。在实际生产中,再生胶与PE材料共混工艺过程可以在开炼机、密炼机或挤出机中进行。
在检测不同PE材料特性上,浙江工业大学环境学院就应用上海净信JXFSTPRP-24来做PE材料样品前处理。
这款仪器有四个优势:
优势一:1分钟内完成2×24、2×48、4×96个样品的研磨,时间更短操作更快!
优势二:可冷冻或常温研磨
优势三:特殊的三维一体震荡模式,全方位破碎样品!
优势四:研磨机工作时不带吵不带晃动
实验地点:浙江工业大学环境学院
实验材料和器具:
样品:不同种类的PE材料
仪器:全自动快速研磨仪(上海净信JXFSTPRP-24)
配件:钢罐一套
实验步骤:
1、将塑料PE粒子直接倒入液氮中冷冻(图一);
2、将液氮冷冻过后的样品放入万能粉碎机内初步预粉碎处理,再倒入液氮内冷冻;
3、将预处理过冷冻的样品加入到钢罐内(图二),再放到液氮内冷冻若干分钟;
4、将适配器装入净信研磨仪中;
5、设定运行参数;
6、启动仪器至研磨程序结束,重复步骤3、4、5即可(图三);
实验结果:
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