• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >PROPERTIES OF FATTY-ACID ESTERS OF STARCH AND THEIR BLENDS WITH LDPE
【24h】

PROPERTIES OF FATTY-ACID ESTERS OF STARCH AND THEIR BLENDS WITH LDPE

机译：淀粉脂肪酯及其LDPE共混物的性能

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

In the present study, starch octanoates OCST1.8 and OCST2.7 with degrees of substitution (d.s.) of 1.8 and 2.7, respectively, and dodecanoate DODST2.7 (d.s. = 2.7), were prepared by esterification of native starch with fatty acid chlorides. Our analyses, including elemental analysis, FTIR, contact angle, DSC, and TGA measurements confirmed the esterification reaction of starch and the degree of substitution. The ester group was found to act like an internal plasticizer, with an increase in the number and the size of fatty acyl chains grafted onto starch. These starch esters were mixed with low density polyethylene (LDPE) at various proportions in a Haake Rheomixer. Water and moisture absorption, thermal and mechanical properties, and biodegradation were investigated as a function of blend composition. The DODST2.7/LDPE blends showed, in general, better thermal stability and higher elongation, but lower tensile strength and water absorption, than did corresponding OCST/LDPE blends. The addition of starch esters to LDPE led to a very slow rate of biodegradation of these blends. (C) 1997 John Wiley & Sons, Inc. [References: 35]
机译：在本研究中，通过将天然淀粉与脂肪酸氯化物酯化来制备淀粉辛酸酯OCST1.8和OCST2.7，取代度（ds）分别为1.8和2.7，以及十二烷酸酯DODST2.7（ds = 2.7）。 。我们的分析（包括元素分析，FTIR，接触角，DSC和TGA测量）证实了淀粉的酯化反应和取代度。发现酯基团起内部增塑剂的作用，并增加了接枝到淀粉上的脂肪酰基链的数量和大小。将这些淀粉酯与低密度聚乙烯（LDPE）在Haake Rheomixer中以各种比例混合。研究了水和水分的吸收，热和机械性能以及生物降解与共混物组成的关系。与相应的OCST / LDPE共混物相比，DODST2.7 / LDPE共混物通常显示出更好的热稳定性和更高的伸长率，但拉伸强度和吸水率更低。 LDPE中添加淀粉酯会导致这些共混物的生物降解速度非常慢。 （C）1997 John Wiley＆Sons，Inc. [参考：35]

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