• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Well-defined ABA- and BAB-type block copolymers of PDMAEMA and PCL
【24h】

Well-defined ABA- and BAB-type block copolymers of PDMAEMA and PCL

机译：pdmaema和pcl的明确定义的aba-和bab型嵌段共聚物

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Triblock copolymers of ABA - and BAB -type consisting of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA, A ) and poly(ε-caprolactone) (PCL, B ) have successfully been prepared. PDMAEMA- b -PCL- b -PDMAEMA ( ABA ) and PCL- b -PDMAEMA- b -PCL ( BAB ) were synthesised by a combination of ring-opening polymerisation of ε-CL, atom transfer radical polymerisation of DMAEMA and end-group conversion, performed through either acylation or azide–alkyne “click” chemistry. All samples were analysed by size exclusion chromatography where it was found that the evaluation of PDMAEMA-containing polymers was difficult due to the thermoresponsivity of PDMAEMA, affecting the solubility of the polymer in the temperature range at which the SEC was operated. From differential scanning calorimetry measurements it was shown that the crystallinity could be altered by changing the order of the blocks; with PDMAEMA as the outer block ( ABA ), the inherent crystallinity of PCL was destroyed while with PCL as the outer block ( BAB ), the degree of crystallinity was in the same proximity as for a PCL homopolymer.
机译：制备由聚（2-（二甲基氨基）甲基丙烯酸乙酯）（PDMAEMA，A）和聚（ε-己内酯）（PCL，B）组成的ABA和BAB的三嵌段共聚物。通过ε-cl的开环聚合的组合，通过ε-cl，原子转移自由基聚合的组合合成PDMAEMA-B -PDMAEMA（ABA）和PCL-B -PDMAEMA-B-PCL（BAB）转化，通过酰化或叠氮化物“点击”化学进行。通过尺寸排阻色谱分析所有样品，其中发现含PDMAEMA的聚合物的评估由于PDMAEMA的热反应性难以影响聚合物在操作秒的温度范围内的溶解度。从差示扫描量热法测量结果表明，通过改变块的顺序可以改变结晶度;通过PDMAEMA作为外块（ABA），在用PCL作为外块（BAB）的同时破坏PCL的固有结晶度，结晶度与PCL均聚物的接近程度相同。

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