摘要
将挤出造粒、注塑成型及力学性能表征的材料加工和性能表征实验串联起来,设计一个适合材料化学专业的微型综合实验.利用双螺杆挤出机和微型切粒机对聚丙烯(PP)粒料进行挤出造粒,采用微型注塑机使熔融的粒料注塑成型得到矩形的样条,再用冲击试验机及万能材料试验机对成型冷却的样条进行力学性能测试.实验结果表明:该微型化实验体系能够批量制备长方体PP样条(80 mm×10 mm×4 mm),尺寸均一,具有良好的力学性能,最大弯曲应力普遍在30 kN/m2左右,最大载荷量达到57.32 N.当色母粒在聚丙烯基体中的添加比例为20%时可得到外观颜色较好的产品.
The extruding granulation,injection molding and mechanical property characterization is combined as a micro-comprehensive experimental case for material chemistry.In this experiment,the polypropylene granulator was extruded and granulated by twin screw extruder and micro granulator.Then the resulting molten granule is injected for molding by a micro-injection molding machine.The mechanical properties of the final molding sample are tested by impact testing machine and universal material testing machine.The experimental results show that the miniaturized experimental system can fabricate cuboid PP splines(80 mm×10 mm×4 mm),which have uniform size and good mechanical properties.The maximum bending stress is about 30 kN/m2,and the maximum load can reach 57.32 N.When the proportion of color masterbatch in polypropylene matrix is 20%,the product with good appearance can be successfully obtained.
作者
许伟钦
刘小慧
曹曼丽
何强芳
XU Weiqin;LIU Xiaohui;CAO Manli;HE Qiangfang(Department of Chemistry, Guangdong University of Education, Guangzhou, Guangdong, 510303, P.R.China)
出处
《广东第二师范学院学报》
2020年第3期69-74,共6页
Journal of Guangdong University of Education
基金
广东省自然科学基金博士启动项目“水溶性笼状配合物的制备及其在抗癌药物负载、缓释性能方面的研究”(2017A030310632)
广东第二师范师范学院教学质量与教学改革工程项目“精品教材《材料化学实验》”(2018jcjs03)。
关键词
聚丙烯
挤出造粒
注塑成型
力学性能
polypropylene
extrusion granulation
injection molding
mechanical properties
