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Facile Synthetic Route of High Molecular Weight Polyvinylsilazane with RAFT Process by Using Microwave Radiation

등록일
2007년 8월 16일 10시 43분 05초
접수번호
1017
발표코드
29P17포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅲ>
발표형식
포스터
발표분야
공업화학
저자 및
공동저자
Nguyen Chi Thanh, 김동표1
충남대학교 공업화학,
1충남대학교 공업화학과,
Recently, Polyvinylsilazane (PVSZ) is used as the well known preceramic polymer for SiCN and/or Si3N4 ceramic materials. Because of its excellent thermal stability, good thermal conductivity, good chemical properties and oxidation resistance, PVSZ find widespread applications in many technologies. Microwave-Assisted synthesis has long been known to accelerate thermal reactions and there exist many literature examples whereby microwave reactors have been used in conventional free-radical polymerization. High molecular weight and high conversion Polyvinylsilazane have been successfully synthesized by reversible addition fragmentation chain transfer (RAFT) polymerization in toluene at temperature 120oC, using microwave method. The conversion of Polyvinylsilazane with 81.7% was readily controlled to obtained the molecular weight 5911 with narrow polydispersity <1.5. The resulting polymer showed a high ceramic yield of 71% at 1000oC. Interestingly, the polymerization time of Polyvinylsilanzane has reduced by the use of microwave heating, compared to conventional heating.

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