摘要
在已实现PVA吹塑成膜基础上,采用拉伸方法进一步提高薄膜性能。通过DSC、TG、X-射线衍射及万能材料实验仪等手段研究了拉伸温度和拉伸比对薄膜结构与性能的影响。结果表明:随拉伸温度和拉伸比增加,薄膜水含量减少,剩余水与PVA束缚加强,水蒸发峰向高温偏移,峰程增宽,熔点、结晶度增加,力学性能及耐水性提高。
The effects of drawing temperature and ratio on the of water content, state of aggregation, crystallinity, mechanical properties, thermal properties, and water resistance of the PVA blown films, which was obtained from HAKKE extrusion-blowing machine, were studied. The results show that thermal drawing can adjust the modifier content in the films, change the intermolecular interactions between modifier and PVA, make more regular orientation structure formed, and increase the crystallinity, mechanical and thermal properties as well as water resistance of the films. When drawing temperature increases from 60°C to 120°C, the tensile strength and the Young's modulus of the films increase by 2.8 and 9.8 times respectively, while draw ratio increases from 2 to 5, the tensile strength and young's modulus of the films increase by 2.5 and 12.5 times respectively.
出处
《四川大学学报（工程科学版）》
EI
CAS
CSCD
2004年第5期44-48,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
国家重点基础研究专项经费资助项目(G1999064809)
关键词
PVA拉伸薄膜
结构
性能
Aggregates
Drawing (forming)
Tensile strength
Thermodynamic properties
Thin films
