RUI: Blending Polymers: The Influence of Copolymer Additives on Phase Separation Behavior

RUI：共混聚合物：共聚物添加剂对相分离行为的影响

• 批准号: 0314428
• 负责人: Dean Waldow
• 金额: --
• 依托单位: Pacific Lutheran University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-06-01 至 2007-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0314428&HistoricalAwards=false
• 关键词: RUI; Blending; Polymers; Influence; Copolymer

The development of new polymer-based materials with tailored properties is often attempted through the mixing of currently existing materials. Successful mixing has often been challenging to accomplish and to aid in the mixing an additive is commonly introduced in an attempt to compatibilize the blends. As the effects of different additives are better understood, the knowledge can be applied to industrial systems with the aim of improving the processing and performance of polymer-based materials. The research plan of this Research in Undergraduate Institution (RUI) proposal investigates ternary equilibrium thermodynamic properties and how copolymer additive can influence phase evolution and consequently polymer blend compatibilities. The research will take place in a predominantly undergraduate institution (PUI) providing research experiences for undergraduate students. This works builds on previous results, which demonstrate that copolymer additives can be used to tailor equilibrium and kinetic properties of blends in a number of ways. The structure and monomer composition of the copolymers in this study will complement previous work. The specific experimental ternary system is a blend of polybutadiene, polystyrene, and copolymers of butadiene and styrene. These systems will be studied experimentally using cloud point measurements, temperature jump wide-angle light scattering, small angle neutron scattering (SANS), and dynamic light scattering techniques. Lastly, Monte Carol computer simulation techniques will be employed to model the experiemental polymer systems both in equilibrium settings and kinetic situations. The proposal includes components that support the NSF criteria of broader impacts. Undergraduate reseach students will be tutored in conducting publishable research where these experiences can be carried with them into future pursuits whether those are in academic research, health related fields, industry, or education. The research experience is also an important part of the student's undergraduate education where our chemistry department integrates reseach into the curriculum. The principal investigator also is incorporating research-rich activities into the physical chemistry curriculum through kinetic studies of current synthetic techniques like atom transfer radical polymerization and using static and dynamic light scattering to study macromolecular systems. Activities will also be pursued which bring underrepresented high school students from a local Mathematics, Engineering, and Science Achievement (MESA) program into our labs for a workshop. The undergraduate research students will mentor the high school students on polymer science through experimental learning activities. The undergraduate participation in this workshop is in accord with our university's interest in service activities for students.

通常通过混合现有材料来尝试开发具有定制特性的新的聚合物基材料。 成功的混合通常具有挑战性，为了帮助混合，通常引入添加剂以试图使共混物相容。 随着对不同添加剂的作用有了更好的了解，这些知识可以应用于工业系统，以改善聚合物基材料的加工和性能。 本研究计划在本科院校（RUI）的建议调查三元平衡热力学性质和共聚物添加剂如何影响相演变，从而聚合物共混物的相容性。 该研究将在一个主要的本科院校（PUI）为本科生提供研究经验。 这项工作建立在以前的结果，这表明，共聚物添加剂可以用来定制的平衡和动力学性能的共混物在许多方面。 在这项研究中的共聚物的结构和单体组成将补充以前的工作。 具体的实验三元体系是聚丁二烯、聚苯乙烯以及丁二烯和苯乙烯的共聚物的共混物。 这些系统将进行实验研究，使用浊点测量，温度跳跃广角光散射，小角中子散射（SANS），和动态光散射技术。 最后，Monte Carol计算机模拟技术将被用来模拟实验聚合物系统在平衡设置和动力学的情况。 该提案包括支持NSF更广泛影响标准的组成部分。 本科研究生将在进行可持续研究方面得到指导，这些经验可以与他们一起进行未来的追求，无论是在学术研究，健康相关领域，工业还是教育领域。 研究经验也是学生本科教育的重要组成部分，我们的化学系将研究融入课程。 首席研究员还通过对原子转移自由基聚合等当前合成技术的动力学研究以及使用静态和动态光散射研究大分子系统，将丰富的研究活动纳入物理化学课程。 还将开展活动，将当地数学，工程和科学成就（MESA）计划中代表性不足的高中学生带到我们的实验室进行研讨会。 本科研究生将通过实验学习活动指导高中学生的聚合物科学。 本科生参与这次工作坊是与我校对学生服务活动的兴趣雅阁的。