摘要
利用扩链剂改性聚乳酸(PLA),然后用改性PLA进行吹膜成型,研究了扩链剂用量对PLA熔体流动性、膜泡稳定性及薄膜力学性能的影响。结果表明:扩链剂的加入使PLA的熔体流动速率(MFR)明显下降,同时使其黏度增加,且提高了膜泡的稳定性;当扩链剂用量为0.5%、0.6%时,PLA薄膜的拉伸强度显著提高,最大冲击强度较纯PLA提高了74.67%。
A chain extender was used to modify polylactic acid （PLA）, and the modified PLA was blown into film. The melt liquidity, bubble stability and mechanical properties of the PLA film were investigated. The results show that： the melt flow rate （MFR） of PLA decreases obviously with the addition of chain extender, the viscosity and the stability of film bubble increase. The tensile strength increases obviously when the chain extender content is 0.5% and 0.6%, and the highest impact strength increases by 74.67% comparing with the pure PLA.
出处
《塑料科技》
CAS
北大核心
2015年第2期74-77,共4页
Plastics Science and Technology
关键词
聚乳酸
薄膜
扩链
改性
Polylactic acid
Film
Chain extension
Modification
