Microwave assisted synthesis of high molecular weight polyvinylsilazane via RAFT process
SCIE
SCOPUS
- Title
- Microwave assisted synthesis of high molecular weight polyvinylsilazane via RAFT process
- Authors
- Nguyen, CT; Nghiem, QD; Kim, DP; Chang, JS; Hwang, YK
- Date Issued
- 2009-10-09
- Publisher
- ELSEVIER SCI LTD
- Abstract
- The microwave-assisted synthesis of high molecular weight polyvinylsilazane (H-PVSZ) leads to a narrow molecular weight distribution at accelerated polymerization rates under controlled/living polymerization, while retaining the excellent controllability offered by reversible addition fragmentation chain transfer (RAFT) polymerization in a thermal reaction process. Under microwave irradiation, higher molecular weight H-PVSZ (6250 vs. 4370) was obtained with higher conversion (86.7 vs. 30.1%) than under conventional heating through a simple 3 h reaction of vinylcyclicsilazane with a molecular weight of 314 in the presence of dithiocarbamate derivatives (RAFT agent) and 2,2'-azobis-isobutyronitrile (AIBN, thermal initiator). H-PVSZ with a well-controlled high molecular weight is useful for synthesizing inorganic-organic diblock copolymer polyvinylsilazane-block-polystyrene (PVSZ-b-PS) with a higher molecular weight and lower polydispersity than by conventional heating of the PVSZ-derived product. (C) 2009 Elsevier Ltd. All rights reserved.
- Keywords
- Polyvinylsilazane; Microwave irradiation; RAFT agents; HIGH-TEMPERATURE; CERAMIC MICROSTRUCTURES; RADICAL POLYMERIZATION; PRECURSOR; COPOLYMERS; SOLVENT
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16068
- DOI
- 10.1016/j.polymer.2009.08.035
- ISSN
- 0032-3861
- Article Type
- Article
- Citation
- POLYMER, vol. 50, no. 21, page. 5037 - 5041, 2009-10-09
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- There are no files associated with this item.
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