Controlled/living radical polymerization of vinylcyclicsilazane by RAFT process and their block copolymers
SCIE
SCOPUS
- Title
- Controlled/living radical polymerization of vinylcyclicsilazane by RAFT process and their block copolymers
- Authors
- Nghiem, QD; Nguyen, CT; Kim, DP
- Date Issued
- 2008-07-01
- Publisher
- WILEY INTERSCIENCE
- Abstract
- High molecular weight poly(vinyl)silazane were synthesized successfully by reversible addition fragmentation chain transfer (RAFT) polymerization in toluene at 120 degrees C, using dithiocarbamate derivatives and 2,2'-azobis-isobutyrylnitrile (AIBN) as the RAFT agents and thermal initiator, respectively. The polymerization of a vinyl-cyclicsilazane oligomer with 82.5% conversion was readily controlled to increase the molecular weight from 1000 to 12,000 g/mol with a narrow polydispersity <1.5. The resulting polymer showed a high ceramic yield of 70 wt % at 1000 degrees C. Moreover, the approach was extended successfully to the synthesis of poly(vinyl)silazane-block-polystyrene as an inorganic-organic diblock copolymer. (C) 2008 Wiley Periodicals, Inc.
- Keywords
- diblock copolymers; inorganic-organic diblock copolymer; inorganic polymers; living radical polymerization; poly(vinyl)silazane; preceramic polymers; radical polymerization; RAFT process; FRAGMENTATION CHAIN TRANSFER; CERAMIC MICROSTRUCTURES; HIGH-TEMPERATURE; PRECURSOR; FABRICATION; 1500-DEGREES-C; LITHOGRAPHY; POLYMERS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16081
- DOI
- 10.1002/POLA.22804
- ISSN
- 0887-624X
- Article Type
- Article
- Citation
- JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, vol. 46, no. 13, page. 4594 - 4601, 2008-07-01
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.