Controlled copolymerization of vinyl acetate with 1‐alkenes and their fluoro derivatives by degenerative transfer

Abstract

The degenerative transfer copolymerization of vinyl acetate with ethene and higher 1‐alkenes, as well as their fluoro derivatives (RfCHCH2), under mild conditions was carried out using AIBN as the initiator and ethyl iodoacetate as the control agent. The obtained random copolymers were fairly high in alkene content, with high molecular weights and relatively narrow polydispersities. The quasi‐living nature of the copolymerization allowed the synthesis of a block terpolymer by sequential addition of two different 1‐alkene comonomers to a vinyl acetate copolymerization system. The fluorinated side chains of vinyl acetate/fluoro alkene copolymers segregate toward the air‐side of thin films, resulting in advancing water contact angle as high as 114°. 2005 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 3728–3736, 2005

Synthesis and Characterization of PDMS Based Triblock and Pentablock Copolymers

“…This produces a new no-rigid block copolymer with a well-define microstructure and favorite thermal properties [8,9]. In this study, thermal properties of the triblock and pentablock copolymers was investigated by DSC which revealed a nearly available way to synthesize polymers with soft segments of PDMS at T g % −120°C [6], PMMA at 89°C, PSt at 110°C and PVAc segments at 45-50°C [7][8][9][10]. This is known as a suitable material to synthesize a rigid block of the new block copolymers from PDMS.…”

“…To make the new block copolymers of silicone suitable for membrane applications, silicone macroinitiator has been used in ATRP reaction with vinyl monomers, while highly rubbery silicone segments are designed in a macromolecular structure with a more rigid vinyl segments. This produces a new no-rigid block copolymer with a well-define microstructure and favorite thermal properties [8,9]. In this study, thermal properties of the triblock and pentablock copolymers was investigated by DSC which revealed a nearly available way to synthesize polymers with soft segments of PDMS at T g % −120°C [6], PMMA at 89°C, PSt at 110°C and PVAc segments at 45-50°C [7][8][9][10].…”

Controlled Synthesis of Ethylene-Vinyl Acetate Based Copolymers by Organometallic Mediated Radical Polymerization

“…Ethylene-vinyl acetate (EVA) copolymer is another valuable polymer produced on an industrial scale. Interestingly, EVA copolymers with higher VAc content (up to 50 mol%) have been prepared by iodide-mediated radical polymerization (18). (12)(13)(14) The synthesis of well-defined EVAs and their incorporation in more complex architectures are thus highly desirable in order to further expand the scope of this polymer.…”

Synthesis of poly(vinyl acetate) by degenerative transfer polymerization in the presence of iodine

“…This is partially due to the high reactivity of the vinyl acetate propagating radical. In recent years, CRP of vinyl acetate was achieved using the RAFT,13–15 degenerative iodine transfer,16–18 and cobalt‐mediated 19. Most of them are based on the degenerative chain transfer process, which accomplishes the molecular weight control via a fast interconversion between the growing radical and the covalent dormant species in the presence of a radical initiator.…”