Synthesis of hydroxy-functionalized star-branched PMMA by anionic polymerization

Dhara, Mahua Ganguly ; Sivaram, Swaminathan ; Baskaran, Durairaj (2009) Synthesis of hydroxy-functionalized star-branched PMMA by anionic polymerization Polymer Bulletin, 63 (2). pp. 185-196. ISSN 0170-0839

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Official URL: http://www.springerlink.com/content/a7vv452r75670m...

Related URL: http://dx.doi.org/10.1007/s00289-009-0082-7

Abstract

Living anionic polymerization has been exploited to synthesize hydroxy end-functionalized PMMA star-branched polymers. Protected hydroxy-functionalized alkyl lithium initiators have been used to initiate anionic polymerization of MMA. Subsequently the living chains with protected hydroxyl function have been used to cross-link ethylene glycol dimethacrylate (EGDMA) in order to form star-branched polymers with cross-linked EGDMA core via 'arm-first' method. The linear arms and the star molecules have been characterized by 1HNMR, GPC, and light scattering. Variation in the number of arms with arm molecular weight and cross-linker loading has been studied. Star-branched PMMA-OH with as many as ~10 arms could be successfully made. Increased molecular weight of PMMA-OH led to decrease in the number of arms incorporated due to increased steric hindrance on the core. Increase in EGDMA concentration slightly increased the arm incorporation.

Item Type:Article
Source:Copyright of this article belongs to Springer.
Keywords:Anionic Polymerization; Star-branched PMMA; Star Polymers
ID Code:51655
Deposited On:29 Jul 2011 04:25
Last Modified:29 Jul 2011 04:25

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