| 农膜用聚乙烯树脂分子结构与耐老化性能的关系 |
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| 引用本文： | 崔海龙,秦立洁,焦红文,陈虎生,徐文国.农膜用聚乙烯树脂分子结构与耐老化性能的关系[J].中国塑料,2007,21(4):58-63. |
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| 作者姓名： | 崔海龙 秦立洁 焦红文 陈虎生 徐文国 |
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| 作者单位： | [1]北京理工大学理学院,北京100081 [2]北京华盾雪花塑料集团有限责任公司,北京100070 |
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| 摘 要： | 通过对低密度聚乙烯（PE_LD）、线形低密度聚乙烯（PE-LLD）、茂金属线形低密度聚乙烯（m-PE—LLD）、乙烯-乙酸乙烯酯共聚物（EVA）等原料直接吹塑农用棚膜进行农田扣棚试验和力学性能测试，分析了各种树脂对生产PE功能性农用棚膜的适用性，并尝试从各种树脂基础分子结构角度对农膜的耐老化性能进行解释。试验结果表明：m—PE-LLD附脂的力学性能明显优于PE-LD和EVA树脂，EVA树脂在透明性方面占有优势；在耐老化性能方面，m-PE-LLD和EVA树脂无论扣棚时间还是测试数据均比PE-LD要好，从连续取样测试数据看出PE-LD断裂伸长保留率下降趋势明显，而m-PE-LLD和EVA树脂则是拉伸强度保留率下降趋势明显。
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| 关 键 词： | 农膜 聚乙烯 相对分子质量 相对分子质量分布 耐老化性能 |
| 文章编号： | 1001-9278（2007）04-0058-06 |
| 修稿时间： | 2007-01-24 |
Relation Between the Molecular Structure of Polyethylene for Agricultural Film and Its Anti-aging Property |
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| CUI Hai-long, QIN Li-jie, JIAO Hong-wen, CHEN Hu-sheng, XU Wen-guo.Relation Between the Molecular Structure of Polyethylene for Agricultural Film and Its Anti-aging Property[J].China Plastics,2007,21(4):58-63. |
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| Authors: | CUI Hai-long QIN Li-jie JIAO Hong-wen CHEN Hu-sheng XU Wen-guo |
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| Affiliation: | 1. College of Science, Beijing Institute of Technology , Beijing 100081, China; 2. Beijing Huadunxuehua Plastics Group Co. Ltd. , Beijing 100070, China |
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| Abstract: | PE-LD, m-PE-LLD, and EVA were compared as agricultural film in their weathering resistance. The mechanical properties of m-PE-LLD were better than PE-LD and EVA, however, the haze of EVA was lower than PE-LD and m-PE-LLD. The aging behavior was tested with tensile property reservation. The agricultural films made of m-PE-LLD and EVA exhibited a higher reservation in elongation at break but a lower in tensile strength than that of PE-LD. |
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| Keywords: | agricultural film polyethylene molecular weight molecular weight distribution anti-aging property |
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