標題: Star polymers via atom transfer radical polymerization from adamantane-based cores
作者: Huang, CF
Lee, HF
Kuo, SW
Xu, HY
Chang, FC
應用化學系
Department of Applied Chemistry
關鍵字: adamantane;atom transfer radical polymerization;PMMA
公開日期: 29-Mar-2004
摘要: A series of novel multifunctional initiators derived from adamantane-based derivatives have been used in the syntheses of various styrenic and (meth)acrylic star polymers by atom transfer radical polymerization (ATRP). Conditions were identified in each system to produce star polymers with nearly monomodal molecular distributions. These synthesized star polymers have glass transition temperatures similar to those known for high-molecular-weight linear polymers. We obtained a series of adamantane-contained star polymers covering a wide range of molecular weights by adjusting the monomer-to-initiator ratio and the solvent polarity. Because of reaction heterogeneity and inevitable termination processes, the occurrence of star-star coupling led to a lower than predicted molecular weight polydispersity. When hydrolyzed from their cores by NaOH, the values of Mw of the arms of the PMMA star polymer did not change with reaction time, at least for the first 48 h of the reaction, which implies that no significant PMMA hydrolysis occurs within this interval of time. (C) 2004 Elsevier Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/j.polymer.2004.01.051
http://hdl.handle.net/11536/26929
ISSN: 0032-3861
DOI: 10.1016/j.polymer.2004.01.051
期刊: POLYMER
Volume: 45
Issue: 7
起始頁: 2261
結束頁: 2269
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