• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Materials >Enzymatic Degradation of Acrylic Acid-Grafted Poly(butylene succinate-co-terephthalate) Nanocomposites Fabricated Using Heat Pressing and Freeze-Drying Techniques
【2h】

Enzymatic Degradation of Acrylic Acid-Grafted Poly(butylene succinate-co-terephthalate) Nanocomposites Fabricated Using Heat Pressing and Freeze-Drying Techniques

机译：热压和冷冻干燥技术制备的丙烯酸接枝聚丁二酸丁二酸丁二酯对苯二甲酸酯纳米复合材料的酶降解

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Biodegradable acrylic acid-grafted poly(butylene succinate-co-terephthalate) (g-PBST)/organically modified layered zinc phenylphosphonate (m-PPZn) nanocomposites were effectively fabricated containing covalent bonds between the g-PBST and m-PPZn. The results of wide-angle X-ray diffraction and transmission electron microscopy revealed that the morphology of the g-PBST/m-PPZn nanocomposites contained a mixture of partially exfoliated or intercalated conformations. The isothermal crystallization behavior of the nanocomposites showed that the half-time for crystallization of 5 wt % g-PBST/m-PPZn nanocomposites was less than 1 wt % g-PBST/m-PPZn nanocomposites. This finding reveals that increasing the loading of m-PPZn can increase the crystallization rate of nanocomposites. Degradation tests of g-PBST/m-PPZn nanocomposites fabricated using the heat pressing and the freeze-drying process were performed by lipase from sp. The degradation rates of g-PBST-50/m-PPZn nanocomposites were significantly lower than those of g-PBST-70/m-PPZn nanocomposites. The g-PBST-50 degraded more slowly due to the higher quantity of aromatic group and increased stiffness of the polymer backbone. The degradation rate of the freeze-drying specimens contained a more extremely porous conformation compared to those fabricated using the heat pressing process.
机译：有效地制备了可生物降解的丙烯酸接枝的聚（丁二酸丁二酯-对苯二甲酸丁二醇酯）（g-PBST）/有机改性的层状苯基膦酸锌（m-PPZn）纳米复合材料，该复合材料包含g-PBST和m-PPZn之间的共价键。广角X射线衍射和透射电子显微镜的结果表明，g-PBST / m-PPZn纳米复合物的形态包含部分剥落或嵌入构象的混合物。纳米复合材料的等温结晶行为表明，5wt％的g-PBST / m-PPZn纳米复合材料的结晶半衰期小于1wt％的g-PBST / m-PPZn纳米复合材料。该发现表明增加m-PPZn的负载量可以增加纳米复合材料的结晶速率。用热压和冷冻干燥法制备的g-PBST / m-PPZn纳米复合材料的降解试验是由脂肪酶从sp。 g-PBST-50 / m-PPZn纳米复合材料的降解速率明显低于g-PBST-70 / m-PPZn纳米复合材料的降解速率。由于较高的芳族基团数量和聚合物主链的刚度，g-PBST-50的降解速度较慢。与使用热压工艺制造的样品相比，冻干样品的降解速率具有更为多孔的构象。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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