2005
DOI: 10.1021/ma0501949
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Binary Copolymerization with Catalytic Chain Transfer. A Method for Synthesizing Macromonomers Based on Monosubstituted Monomers

Abstract: With appropriate choice of conditions, copolymerization of monosubstituted monomers [CH2CHX:  e.g., styrene, butyl acrylate (BA)] in the presence of small amounts of an α-methylvinyl monomer [CH2C(CH3)Y:  e.g., α-methylstyrene (AMS), methyl methacrylate (MMA), methacrylonitrile (MAN)] and a cobaloxime as chain transfer catalyst provides a route to macromonomers that are composed largely of the monosubstituted monomer and yet have a chain end derived from the α-methylvinyl monomer (−CH2−C(CH2)Y). The various… Show more

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Cited by 34 publications
(28 citation statements)
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“…The mole fraction of MMA in the copolymer (F MMA ) calculated as 0.80; and F BA calculated as 0.18 . According to the literature, MMA has a higher reactivity ratio, so it tends to react with itself more than BA during polymerization. Thus, the mole fraction of MMA was found to be higher than that of BA.…”
Section: Resultsmentioning
confidence: 99%
“…The mole fraction of MMA in the copolymer (F MMA ) calculated as 0.80; and F BA calculated as 0.18 . According to the literature, MMA has a higher reactivity ratio, so it tends to react with itself more than BA during polymerization. Thus, the mole fraction of MMA was found to be higher than that of BA.…”
Section: Resultsmentioning
confidence: 99%
“…This means that with the irreversible AFCT agent, transfer is not completely irreversible because the end group formed is a transfer agent. According to the literature [23], the styrene macromonomers as chain transfer agents are temperature-dependent for the transfer reaction. For the polymerizations of styrene in the presence of the styrene macromonomer at 80 °C, there was no significant variation in the molecular weight of the polystyrene formed with macromonomer concentration.…”
Section: Methodsmentioning
confidence: 99%
“…Macromonomer RAFT polymerization is most effective with methacrylate monomers (41)(42)(43). However, the transfer constants of the methacylate macromonomers are low (C tr~0 .5 for n >2) (38,(44)(45)(46), which necessitates the use of starved feed conditions to achieve low dispersities. With monosubstituted monomers (e.g.…”
Section: Macromonomer Raft Polymerizationmentioning
confidence: 99%