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Reactive Polymer Blending

反应性聚合物共混

基本信息

批准号：
8922410
负责人：
Chris Macosko
金额：
$ 9.07万
依托单位：
University of Minnesota-Twin Cities
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1990
资助国家：
美国
起止时间：
1990-08-15 至 1992-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8922410&HistoricalAwards=false
关键词：
Reactive Polymer Blending

项目摘要

An important trend in thermoplastics is the growth of products based on polymer-polymer blends. They are called "engineered" thermoplastics because they have high enough modulus, toughness and softening temperature to be used the same way metals are used. Most of these blends are immiscible but stabilized in a highly dispersed morphology by graft or block copolymers at the interface between the phases. One way to make these copolymers is by coupling reactions during melt blending. This research will focus on blends of two immiscible polymers, one rigid (glass transition temperature greater than ambient temperature) the other soft (glass transition temperature less than ambient temperature). Initially both phases will be amorphous. The strategy will be to design several model reactive polymer pairs and combine them in a small laboratory melt mixer which duplicates the essential features of the industrial scale process. The PIs plan to identify the major variables controlling the process by changes in composition, chemistry, polymer architecture and chain length. Scanning and transmission electron microscopy will be used as the major microstructural characterization method. From image analysis on these micrographs and single drop studies, the drop break up and coalescence process with interfacial reaction will be modeled. This research should yield better methods for the analysis of these polymer blends as well as a fundamental understanding of the process and new blend compatibilizing methods and materials.

热塑性塑料的一个重要趋势是产品的增长基于聚合物-聚合物共混物。他们被称为“工程” 热塑性塑料因为它们具有足够高的模量，韧性和软化温度要用同样的方法金属被使用。这些共混物中的大多数不混溶，通过接枝或嵌段以高度分散的形态稳定在相之间的界面处的共聚物。的一种方法制备这些共聚物是通过熔融过程中的偶联反应共混这项研究将集中在两种不混溶聚合物的共混物，一种刚性（玻璃化转变温度高于环境温度温度）的其他软（玻璃化转变温度低环境温度）。最初，两个阶段将性无定形战略将是设计几种模型，反应性聚合物对，并在一个小实验室中将它们联合收割机熔融混合器，其复制了工业规模工艺。 PI计划确定主要的通过组成变化控制过程的变量，化学、聚合物结构和链长。扫描和透射电子显微镜将被用作主要的微观结构表征方法从图像分析在这些显微照片和单滴研究中，与界面反应的聚结过程，模型。这项研究应该会产生更好的方法，这些聚合物共混物的分析以及基本的了解工艺和新的共混物相容性方法和材料。