题目：Emerging Trend in Polymer Reaction Engineering: Design and precision synthesis of polymer materials for targeted application properties
时间:7月9日（周三）下午3:00-4:30
地点：化学A楼演讲厅

报告人：朱世平教授，加拿大麦克马斯特大学（McMaster）科研讲座（Canada Research Chair）教授，加拿大麦克马斯特大学化工系前系主任、加拿大工程院院士
邀请人：朱新远教授、肖文德教授、罗正鸿教授（beat365）
报告内容：
We are living in a “Materials World” and consume more polymers than all other types of synthetic materials combined. Polymers are chain molecules and their materials properties are determined to a large extent by their chain microstructure properties. Presented in this seminar are a chemical engineer’s point of view on advanced polymer materials and two research examples that include: (1) N2-coagulatable and CO2-redispersable polymer latexes and (2) model-based computer-programmed semi-batch reactor processes for design and control of gradient copolymers.

(1) Millions of tons of polymer latexes are produced annually by emulsion polymerization. The unique properties of latex products offer a variety of applications in rubber, plastic, coating, paper, textile, leather, and construction industries, as well as biomedicine and pharmaceuticals. Most emulsion products contain about 45 to 60 vol% water. In solid form, latexes are coagulated by large amount of salts or acids, washed and dried. Wasteful water and intensive energy are big problems. In liquid form, half of the costs spent in storage and transportation are for water. We developed polymer latexes that can be coagulated by N2 and re-dispersed by CO2 bubbling. Our approach is by incorporating a small amount amine- or amidine-containing derivative as comonomer or reactive surfactant in emulsion polymerization. The coagulation/re-dispersion processes can be repeated many times, even with washed and dried latexes.

(2) Gradient copolymers are a novel class of polymers having composition varying from end to end along chain backbone. In conventional radical polymerization, it takes only seconds for individual chains to fully grow. Within this time scale, it is impossible to engineer the end-to-end composition of individual chains. In contrast, the chain growth in controlled radical polymerization (NMP, ATRP and RAFT) takes hours. Design and control of the composition becomes practical. However, copolymers prepared by batch reactors have as-synthesized gradient profiles determined by comonomer reactivity ratios. We developed model-based computer-programmed semi-batch reactor processes that allow precise design and control of any desired end-to-end composition variations at will.
 
报告人简介：
    朱世平教授1982年毕业于浙江大学化工系，91年在麦克马斯特大学（McMaster）获博士学位，现为麦克马斯特大学化工系加拿大科研讲座（Canada Research Chair）教授。
朱教授长期致力于聚合反应工程与科学研究，他领导的研究小组为烯类单体的催化聚合机理、聚合物结构调控理论与技术的发展，为新聚合过程特别是原子转移自由基聚合与聚合物材料的开发及生物材料表面改性技术作出过突出贡献。在国际学术刊物上发表论文260余篇，SCI他引6000多次，H因子45。
    朱教授2000年获加拿大安大略“总理研究优秀奖”(PREA)，04年获中国国家自然科学基金委“海外青年学者”合作研究基金，05年入选中国教育部“长江学者讲座教授”，12年入选中国中组部短期 “千人计划”。朱教授是加拿大化学联合会会士（FCIC），工程联合会会士（FEIC），加拿大工程院院士（FCAE）。2010年获浙江省“西湖友谊奖，11年获加拿大化学联合会“大分子科学与工程奖”(MSEA)。