期刊论文

中文

农业工程学报

1002-6819

2016

32

15

182-186

10.11975/j.issn.1002-6819.2016.15.025

湖南省自然科学省市联合基金项目（14JJ5017） 湖南省高校创新平台开放基金项目（13K071）

本校为第一机构

聚乳酸农用薄膜在自然条件下能够降解为CO_2和H_2O,可以有效地避免传统农用薄膜废弃后造成的土壤和环境污染。将聚己内酯与聚乳酸共混可以改善聚乳酸脆性强和韧性差的特点。该文将不同质量比例的聚己内酯(polycaprolactone,PCL)和聚乳酸(polylactic acid,PLA)熔融共混后通过注射成型工艺制备了农业薄膜用PCL/PLA共混物,研究了PCL与PLA配比对共混物力学性能、热稳定性、结晶熔融行为以及表面润湿性的影响。结果表明:随着PCL含量增加,共混物的拉伸强度逐渐下降,而拉伸断裂伸长率和冲击强度则先增大后减小。PCL质量分数为50%时,共混物拉伸断裂伸长率和冲击强度分别达到最大值11.2%和6.4 KJ/m~2;扫描...

Poly lactic acid (PLA) is a kind of environment-friendly high polymer material with the characteristics of biodegradability and good processability, which can be used in producing agricultural film. However, the PLA perform brittleness leads to several defects of PLA film, which might be overcome by addition of polycaprolactone (PCL). This study aimed to find the optimal PCL and PLA ratio for PCL/PLA blend preparation. The preparation and performance tests in the study were all completed in the key laboratory of bio-composite materials of College of Materials Science and Engineering in Central...