• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Polymers and the Environment >Disintegration and Biodegradation in Soil of PBAT Mulch Films: Influence of the Stabilization Systems Based on Carbon Black/ Hindered Amine Light Stabilizer and Carbon Black/Vitamin E
【24h】

Disintegration and Biodegradation in Soil of PBAT Mulch Films: Influence of the Stabilization Systems Based on Carbon Black/ Hindered Amine Light Stabilizer and Carbon Black/Vitamin E

机译：PBAT覆盖膜在土壤中的崩解和生物降解：基于炭黑/受阻胺光稳定剂和炭黑/维生素E的稳定系统的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This work characterized the disintegration and biodegradation of aged samples of PBAT films with and without photostabilization additives. The objective is to correlate these processes with properties affected after aging, i.e. molecular weight and gel content. Three different formulations were studied: pure polymer; PBAT with carbon black and hindered amine light stabilizer (HALS) and PBAT with carbon black and phenolic stabilizer vitamin E. The samples were monitored for 12months. As expected, the lower level of photostabilization lead to the higher disintegration and biodegradation rates. Nevertheless, mineralization test showed that during time the differences among biodegradation rates become subtler. The crystallinity degree presented changes only at an advanced stage of degradation process, showing a reduction. The evaluation of the carbonyl index, molecular weight, surface morphology and visual analysis allowed to observe that the aged samples with lower gel content and lower molecular weight showed a faster degradation rate. The changes in material structure due to the increase of aromatic units concentration is the main hypothesis to explain the material behavior during degradation in soil.
机译：这项工作的特点是在有和没有光稳定添加剂的情况下，PBAT薄膜老化样品的分解和生物降解。目的是将这些过程与老化后受影响的性质，即分子量和凝胶含量相关联。研究了三种不同的配方：纯聚合物；含有炭黑和受阻胺光稳定剂（HALS）的PBAT和含有炭黑和酚类稳定剂维生素E的PBAT。监测样品12个月。如预期的那样，较低的光稳定水平导致较高的崩解和生物降解速率。然而，矿化测试表明，随着时间的流逝，生物降解率之间的差异变得微妙。所呈现的结晶度仅在降解过程的后期才发生变化，表现出降低。通过对羰基指数，分子量，表面形态和目测分析的评估，可以观察到较低凝胶含量和较低分子量的老化样品降解速度更快。芳香单元浓度增加引起的材料结构变化是解释土壤降解过程中材料行为的主要假设。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号