Synthesis of Functional Polypropylene Containing Hindered Phenol Stabilizers and Applications in Metallized Polymer Film Capacitors,Macromolecules

当前位置： X-MOL 学术 › Macromolecules › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Synthesis of Functional Polypropylene Containing Hindered Phenol Stabilizers and Applications in Metallized Polymer Film Capacitors
Macromolecules ( IF 5.1 ) Pub Date : 2015-04-24 00:00:00 , DOI: 10.1021/acs.macromol.5b00439
Gang Zhang ₁ , Houxiang Li ₁ , Martin Antensteiner ₁ , T. C. Mike Chung ₁

Affiliation

This paper discusses a new family of polymeric stabilizers (antioxidants) containing a polypropylene backbone and several pendant hindered phenol groups (PP-HP), with both random and tapered copolymer microstructures. They are effectively prepared by Steglich esterification of the corresponding hydroxylated polypropylene (PP-OH) copolymers with the hindered phenol molecule containing a carboxylic acid moiety. Some resulting PP-HP copolymers show significantly higher thermal-oxidative stability than the pristine PP polymer and the commercial PP products that contain a small amount of organic hindered phenol stabilizers. The better oxidative stability was also observed in PP/PP-HP blends under elevated temperatures. Overall, the PP chain degradation temperature increases with the increase of HP concentration in the matrix. The effectiveness of the PP-HP stabilizer is attributed to its comparability and cocrystallization with the PP homopolymer, which result in a uniform distribution of hindered phenol moieties. It also allows the relatively higher concentration of hindered phenol (polar) moieties in the PP (nonpolar) matrix without phase separation. In addition to the known advantages of polymer-bonded stabilizers, with low mobility and volatility to prevent loss through diffusion and/or extraction (particularly acute in films and coatings), the PP-HP thin dielectric films with uniform morphology show a higher dielectric constant and maintain low dielectric loss, particularly for the tapered PP-HP copolymers with high crystallinity.

中文翻译：

含功能性受阻酚稳定剂聚丙烯的合成及其在金属化聚合物薄膜电容器中的应用

本文讨论了一个新的聚合物稳定剂系列（抗氧化剂），该聚合物稳定剂包含聚丙烯主链和几个侧链受阻酚基团（PP-HP），具有无规和锥形共聚物微观结构。它们是通过相应的羟基化聚丙烯（PP-OH）共聚物与受阻酚分子中含有羧酸部分的Steglich酯化反应有效制备的。某些所得的PP-HP共聚物显示出比原始PP聚合物和含有少量有机受阻酚稳定剂的商品PP产品更高的热氧化稳定性。在高温下，PP / PP-HP混合物中也观察到了较好的氧化稳定性。总体而言，PP链降解温度随基质中HP浓度的增加而增加。PP-HP稳定剂的有效性归因于其与PP均聚物的可比性和共结晶性，可导致受阻酚部分的均匀分布。它还允许PP（非极性）基质中受阻酚（极性）部分的浓度相对较高，而不会发生相分离。除了聚合物键合稳定剂的已知优点外，它具有低迁移率和挥发性，可防止因扩散和/或萃取而损失（特别是在膜和涂层中很严重），具有均匀形态的PP-HP薄介电膜显示出更高的介电常数并保持低介电损耗，特别是对于具有高结晶度的渐缩PP-HP共聚物而言。导致受阻酚部分的均匀分布。它还允许PP（非极性）基质中受阻酚（极性）部分的浓度相对较高，而不会发生相分离。除了聚合物键合稳定剂的已知优点外，它具有低迁移率和挥发性，可防止因扩散和/或萃取而损失（特别是在膜和涂层中很严重），具有均匀形态的PP-HP薄介电膜显示出更高的介电常数并保持低介电损耗，特别是对于具有高结晶度的渐缩PP-HP共聚物而言。导致受阻酚部分的均匀分布。它还允许PP（非极性）基质中受阻酚（极性）部分的浓度相对较高，而不会发生相分离。除了聚合物键合稳定剂的已知优点外，它具有低迁移率和挥发性，可防止因扩散和/或萃取而损失（特别是在膜和涂层中很严重），具有均匀形态的PP-HP薄介电膜显示出更高的介电常数并保持低介电损耗，特别是对于具有高结晶度的渐缩PP-HP共聚物而言。

更新日期：2015-04-24

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南