摘要
利用自行研制的振动注射成型装置进行注射样条实验 ,研究低频振动场对注射样条制件的物理力学性能的影响。实验目的在于用低频振动注射工艺来实现等规聚丙烯制件自增强的同时自增韧。在低温 (2 10℃ )低频率(0 47Hz)和高温 (2 70℃ )高频率 (2 .3 3Hz)条件下 ,可以实现低频振动场对注射等规聚丙烯样条的强度增强的同时 ,塑性和冲击韧性也得到改善 ;中温 (2 3 0℃ )下 ,振动频率的改变有利于制件综合力学性能的改善。压力振动幅度的增加有利于样条屈服强度和冲击强度的提高 ,但使制件的塑性有所降低 。
Effects of low frequency field on mechanical properties of injected specimens were explored by self made low frequency vibration injection molding(VIM)device. Aim of the experiment is to realize self reinforcement and self tougheness simultaneously of the isotactic polypropylene(I PP) moldings injected by the VIM device.At low temperature(such as 210 ℃)and in the range of low frequency (0.47 Hz),the tensile yield strength and impact strength is enhanced at the same time with the result of increased plasticity and impact strength,and the trend can be seen at high temperature(270 ℃)and in the range of high frequency(2.33 Hz).At middle temperature(230 ℃),the change of vibration frequency can better the overall mechanical properties.The increase of vibration pressure amplitude is favorable for the increase of tensile yield strength and impact strength,but the plasticity of the specimens is lost slightly.
出处
《中国塑料》
CAS
CSCD
北大核心
2003年第6期77-80,共4页
China Plastics
基金
高校博士学科点专项基金 (2 0 0 0 0 610 2 1)
国家自然科学基金重点项目 (2 993 40 70 )
国家重点基础研究专项基金 (G19990 64 80 9)
关键词
振动注射
等规聚丙烯
自增强
自增韧
振动频率
振动压力幅度
low frequency
isotactic polypropylene
self reinforcement
self toughening
vibration frequency
vibration pressure amplitude
