Influence of injection molding process on mechanical properties of cellulose diacetate
Cellulose diacetate plastic(DACP)was injection molded under different process conditions with a change in the injection temperature,injection speed,pressure,and other conditions one by one.The mechanical properties of the injection-molded products were investigated.The results indicated that with a change in the injection conditions,the molded products presented a regular change in their performance.The injection temperature exhibited a greater influence on the toughness and elongation at break of the molded products.Their toughness was further enhanced with an increase in the injection temperature,followed by a significant improvement in the elongation at break.However,the molded products started yellowing at a temperature of above 230℃.An over high or over low injection speed might lead to dete-rioration in the impact resistance of the molded products.The products molded at a medium speed of 55%exhibited the highest impact strength.The change of injection pressure generated little effect on the performance of the molded prod-ucts;however,an excessive pressure led to some defects such as flashing.The molded products exhibited the optimal overall performance at an injection temperature of 225℃,an injection speed of 55%,and an injection pressure of 9 MPa In this sense,selecting an appropriate injection molding process condition can improve the performance of the injection-molded DACP products.
国家科技期刊平台
NSTL
万方数据
