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首页> 外文学位 >Analysis of the mechanical properties of biodegradable films made from blends of polylactic acid (PLA) and polybutylene succinate adipate random copolymer by blown film extrusion.
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Analysis of the mechanical properties of biodegradable films made from blends of polylactic acid (PLA) and polybutylene succinate adipate random copolymer by blown film extrusion.

机译：通过吹膜挤出分析聚乳酸（PLA）和聚丁二酸丁二酸丁二酯无规共聚物的共混物制成的可生物降解薄膜的机械性能。

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摘要

Poly lactic acid (PLA) and aliphatic polyesters such as polybutylene succinate adipate random copolymer, have been extensively studied in the past few years for the production of biodegradable products. However those products used pure materials but not blends of both polymers.; The main purpose of this research was to produce blown film from blends of these materials and determine how the mechanical properties change when the processing conditions are modified.; It was found that films produced with 50% of PLA and 50% of aliphatic polyester present very competitive properties similar to those found in PE films. The increase in the blow-up ratio (BUR) improves the tensile properties and tear resistance as a result of high molecular orientation. The processability, film toughness and flexibility were improved with the addition of aliphatic polyester.; Higher ratios of PLA result in process instabilities but these could be eliminated using an efficient cooling system including chilled air and a dual lip air ring.
机译：过去几年，聚乳酸（PLA）和脂族聚酯（例如聚丁二酸琥珀酸丁二酯无规共聚物）已被广泛研究用于生产可生物降解的产品。但是，这些产品使用的是纯净材料，而不是两种聚合物的混合物。这项研究的主要目的是从这些材料的混合物中生产吹膜，并确定在改变加工条件时机械性能如何变化。发现用50％的PLA和50％的脂族聚酯生产的膜表现出与PE膜相似的非常有竞争力的性能。吹胀比（BUR）的增加由于高分子取向而改善了拉伸性能和抗撕裂性。脂族聚酯的加入改善了可加工性，薄膜韧性和柔韧性。较高的PLA比例会导致工艺不稳定，但是可以使用高效的冷却系统（包括冷空气和双唇形空气环）消除这些不稳定因素。

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  • 作者

    Laverde, German V.;

  • 作者单位

    University of Massachusetts Lowell.;

  • 授予单位 University of Massachusetts Lowell.;
  • 学科 Engineering Materials Science.; Plastics Technology.
  • 学位 M.S.
  • 年度 1997
  • 页码 66 p.
  • 总页数 66
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;整形外科学（修复外科学）;
  • 关键词

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