Polymerization of N-isopropylacrylamide in the presence of poly(acrylic acid) and poly(methacrylic acid) containing ω-unsaturated end-groups

Ronan Mchale; Fawaz Aldabbagh; William M. Carroll; Bunichiro Yamada

doi:10.1002/pola.22232

Polymerization of N-isopropylacrylamide in the presence of poly(acrylic acid) and poly(methacrylic acid) containing ω-unsaturated end-groups

Ronan Mchale
, Fawaz Aldabbagh
, William M. Carroll
, Bunichiro Yamada

National University of Ireland

Research output: Contribution to journal › Article › peer-review

Abstract

Polymerization of n-isopropylacrylamide in the presence of poly(acrylic acid) and poly(methacrylic acid) containing ω-unsaturated end-groups is presented. A novel selective precipitation was successfully used to remove unreacted macromonomer (poly(AA) homopolymer) resulting in pure graft copolymer. An average graft density of one poly(AA) branch every 42 NIPAM units was calculated for the latter copolymer sample at 41% conversion of NIPAM, whilst the radical reactivity ratio indicated a very similar average graft density of one poly(AA) every 40 NIPAM units. AFCT occurs with the methacrylic analogue of poly (AA) macromonomer in polymerizations with NIPAM at low conversion, presumably due to the steric hindrance associated with the polymer main chain. This was followed by copolymerizations of the in situ formed NIPAM macromonomer, and polymerizations of NIPAM initiated by poly(MAA) radicals, at higher conversions.

Original language	English
Pages (from-to)	4394-4400
Number of pages	7
Journal	Journal of Polymer Science, Part A: Polymer Chemistry
Volume	45
Issue number	18
Early online date	6 Aug 2007
DOIs	https://doi.org/10.1002/pola.22232
Publication status	Published - 15 Sept 2007
Externally published	Yes

Keywords

Chain transfer
Graft copolymers
Macromonomers
Radical polymerization

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@article{6007519a3ab24447b547f44665ea0bf6,

title = "Polymerization of N-isopropylacrylamide in the presence of poly(acrylic acid) and poly(methacrylic acid) containing ω-unsaturated end-groups",

abstract = "Polymerization of n-isopropylacrylamide in the presence of poly(acrylic acid) and poly(methacrylic acid) containing ω-unsaturated end-groups is presented. A novel selective precipitation was successfully used to remove unreacted macromonomer (poly(AA) homopolymer) resulting in pure graft copolymer. An average graft density of one poly(AA) branch every 42 NIPAM units was calculated for the latter copolymer sample at 41\% conversion of NIPAM, whilst the radical reactivity ratio indicated a very similar average graft density of one poly(AA) every 40 NIPAM units. AFCT occurs with the methacrylic analogue of poly (AA) macromonomer in polymerizations with NIPAM at low conversion, presumably due to the steric hindrance associated with the polymer main chain. This was followed by copolymerizations of the in situ formed NIPAM macromonomer, and polymerizations of NIPAM initiated by poly(MAA) radicals, at higher conversions.",

keywords = "Chain transfer, Graft copolymers, Macromonomers, Radical polymerization",

author = "Ronan Mchale and Fawaz Aldabbagh and Carroll, \{William M.\} and Bunichiro Yamada",

year = "2007",

month = sep,

day = "15",

doi = "10.1002/pola.22232",

language = "English",

volume = "45",

pages = "4394--4400",

journal = "Journal of Polymer Science, Part A: Polymer Chemistry",

issn = "0887-624X",

publisher = "John Wiley \& Sons Inc.",

number = "18",

}

Polymerization of N-isopropylacrylamide in the presence of poly(acrylic acid) and poly(methacrylic acid) containing ω-unsaturated end-groups. / Mchale, Ronan; Aldabbagh, Fawaz; Carroll, William M. et al.
In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 45, No. 18, 15.09.2007, p. 4394-4400.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Polymerization of N-isopropylacrylamide in the presence of poly(acrylic acid) and poly(methacrylic acid) containing ω-unsaturated end-groups

AU - Mchale, Ronan

AU - Aldabbagh, Fawaz

AU - Carroll, William M.

AU - Yamada, Bunichiro

PY - 2007/9/15

Y1 - 2007/9/15

N2 - Polymerization of n-isopropylacrylamide in the presence of poly(acrylic acid) and poly(methacrylic acid) containing ω-unsaturated end-groups is presented. A novel selective precipitation was successfully used to remove unreacted macromonomer (poly(AA) homopolymer) resulting in pure graft copolymer. An average graft density of one poly(AA) branch every 42 NIPAM units was calculated for the latter copolymer sample at 41% conversion of NIPAM, whilst the radical reactivity ratio indicated a very similar average graft density of one poly(AA) every 40 NIPAM units. AFCT occurs with the methacrylic analogue of poly (AA) macromonomer in polymerizations with NIPAM at low conversion, presumably due to the steric hindrance associated with the polymer main chain. This was followed by copolymerizations of the in situ formed NIPAM macromonomer, and polymerizations of NIPAM initiated by poly(MAA) radicals, at higher conversions.

AB - Polymerization of n-isopropylacrylamide in the presence of poly(acrylic acid) and poly(methacrylic acid) containing ω-unsaturated end-groups is presented. A novel selective precipitation was successfully used to remove unreacted macromonomer (poly(AA) homopolymer) resulting in pure graft copolymer. An average graft density of one poly(AA) branch every 42 NIPAM units was calculated for the latter copolymer sample at 41% conversion of NIPAM, whilst the radical reactivity ratio indicated a very similar average graft density of one poly(AA) every 40 NIPAM units. AFCT occurs with the methacrylic analogue of poly (AA) macromonomer in polymerizations with NIPAM at low conversion, presumably due to the steric hindrance associated with the polymer main chain. This was followed by copolymerizations of the in situ formed NIPAM macromonomer, and polymerizations of NIPAM initiated by poly(MAA) radicals, at higher conversions.

KW - Chain transfer

KW - Graft copolymers

KW - Macromonomers

KW - Radical polymerization

U2 - 10.1002/pola.22232

DO - 10.1002/pola.22232

M3 - Article

AN - SCOPUS:34548484618

SN - 0887-624X

VL - 45

SP - 4394

EP - 4400

JO - Journal of Polymer Science, Part A: Polymer Chemistry

JF - Journal of Polymer Science, Part A: Polymer Chemistry

IS - 18

ER -

Polymerization of N-isopropylacrylamide in the presence of poly(acrylic acid) and poly(methacrylic acid) containing ω-unsaturated end-groups

Abstract

Keywords

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