摘要
低温摆锤冲击是评估塑料材质在试验条件下韧性和脆性的重要质量指标。以聚丙烯(PP)和丙烯腈―丁二烯―苯乙烯共聚物(ABS)为例,从测试环节的摆锤能量、冷冻温度、冷冻时间、缺口加工方式、保温介质、试验跨距分别探究其对低温冲击强度的影响。结果表明,使用不同能量的摆锤对低温冲击测试结果无明显影响;采用不同的冷冻温度进行样条处理,低温冲击测试结果之间不能相比较;冷冻时间0.5h低温冲击强度偏大,冷冻1~6h低温冲击强度无明显差异;机铣缺口的低温冲击强度小于注塑缺口的低温冲击强度;常见的泡沫、不锈钢、聚甲醛(POM)低温冲击样条保温介质,保温效果较好的是聚甲醛(POM)保温盒;简支梁不同试验跨距对测试结果有影响,跨距越大,低温冲击强度越大。
Low temperature pendulum impact is an important quality index to evaluate the toughness and brittleness of plastic materials under test conditions. Taking polypropylene(PP) and acrylonitrile-butadienestyrene copolymer(ABS) as examples, the effects of the pendulum energy, freezing temperature, freezing time,notch processing method, insulation medium and test span on the low temperature impact strength were investigated respectively. The results show that the use of different energy of the pendulum has no obvious influence on the low temperature impact test results. Different freezing temperatures are used for spline treatment,the low temperature impact test results can not be compared with each other. The low temperature impact strength is higher at 0.5 h, and there is no significant difference between 1h-6h after freezing. The low temperature impact strength of the milling notch is less than that of the injection notch. Common foam, stainless steel, POM(POM)low temperature impact spline insulation medium, insulation effect is better POM(POM) insulation box. Different test spans of simply supported beams have influence on the test results. The larger the span is, the greater the low temperature impact strength is.
作者
王丽丽
廖成玲
吴博
庞承焕
陶四平
WANG Li-li;LIAO Cheng-ling;WU Bo;PANG Cheng-huan;TAO Si-ping(National Ploymer Materials Industry Innovation Center Co.,Ltd,Guangzhou 510663,China;TianJin Kingfa Advanced Material Co.,Ltd,Tianjin 300300,China;Kingfa Science&Technology Co.,Ltd,Guangzhou 510663,China)
出处
《广州化学》
CAS
2022年第2期26-33,57,共9页
Guangzhou Chemistry
基金
国家重点研发计划项目(2019YFF0216901)。
关键词
低温冲击
摆锤冲击
影响因素
冷冻
聚丙烯
丙烯腈―丁二烯―苯乙烯共聚物
low-temperature impact
pendulum impact
influence factor
freeze
polypropylene(PP)
acrylonitrile-butadiene-styrene copolymer(ABS)
