梁晓红,于振菲,吴佳鑫,赵子龙,呼和,王羽,靳烨,董同力嘎.单轴拉伸PLLA/PBS共混薄膜的包装特性研究[J].包装工程,2014,35(23):52-57.
LIANG Xiao-hong,YU Zhen-fei,WU Jia-xin,ZHAO Zi-long,HU He,WANG Yu,JIN Ye,DONG Tungalag.Packaging Characteristics of Uniaxially Stretched PLLA/PBS Blend Film[J].Packaging Engineering,2014,35(23):52-57. |
| 单轴拉伸PLLA/PBS共混薄膜的包装特性研究 |
| Packaging Characteristics of Uniaxially Stretched PLLA/PBS Blend Film |
| 投稿时间：2014-06-23 修订日期：2014-12-10 |
| DOI： |
| 中文关键词: 力学性能 结晶性能 阻氧性能 共混薄膜 |
| 英文关键词: mechanical property crystallization property oxygen barrier property blend film |
| 基金项目:国家自然科学基金 （51163010）；内蒙古草原英才科研基金 （2011）；第四十八批国家博士后科学基金面上资助项目 |
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| 中文摘要: |
| 目的 提高聚乳酸（PLLA）的韧性、 强度及阻氧性能。方法 采用双螺杆挤出流延线制备单轴拉伸 PLLA/聚丁二酸丁二醇酯（PLLA/PBS）共混薄膜， 用万能拉伸试验机、 差示扫描量热分析仪（DSC）和透氧仪， 对不同拉伸比例的 PLLA/PBS 共混薄膜的力学性能、 热学性能和阻氧性进行了评估。结果 随着拉伸比例的增大， PLLA/PBS共混薄膜屈服强度和弹性模量增大， 断裂伸长率呈先增大后降低的趋势。随拉伸比例的增大， PLLA/PBS共混薄膜结晶速率明显提高， 其阻氧性也得到一定的改善。结论 通过单轴拉伸和与PBS共混提高了PLLA的韧性和强度， 中等拉伸比例的PLLA/PBS共混薄膜的阻氧性相对较好。 |
| 英文摘要: |
| Objective To improve the toughness, strength and oxygen barrier properties of poly(L-lactic acid)(PLLA). Methods Uniaxially stretched PLLA/poly(butylene succinate) (PLLA/PBS) blend film was prepared through twin-screw extrusion line. Universal tensile testing machine, differential scanning calorimetric analyzer and oxygen permeability test were used to evaluate the mechanical, thermal and oxygen barrier behavior of PLLA/PBS film with different draw ratios. Results Yield strength and Young′ s modulus of uniaxially stretched PLLA/PBS film were increased. But the elongations at break first increased and then decreased with the increase of the draw ratios. Crystallization rate of PLLA/PBS film increased with the increase of the draw ratios and its oxygen barrier properties were also improved. Conclusion By uniaxial stretching and blending with PBS, the toughness and strength of PLLA were improved, furthermore, the oxygen barrier properties of the medium stretched PLLA/PBS film were relatively good. |
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