A novel thermosensitive polymer, poly(methyl 2-propionamidoacrylate), with geminal substituents

Hirokazu Okamura, Takeshi Mori, Keiji Minagawa, Seizo Masuda, Masami Tanaka

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

A novel thermosensitive polymer, poly(methyl 2- propionamidoacrylate) (PMPA), was prepared and the phase transition behavior in an aqueous solution was studied. PMPA have geminal substituents of propionamide and methoxy carbonyl in each monomer unit. It was found that PMPA shows the lower critical solution temperature (LCST) at 50.6°C sharply. The LCST of PMPA was almost independent of the polymer concentration above 40 g/l, while, below 40 g/l, it decreased with the increasing polymer concentration. The effect of salt addition (NaCl, NaBr, and Na2SO4) on the LCST was also studied. The LCST of PMPA linearly decreased with the increasing concentration of each salt. The salting-out effect of these salts was in line with the Hofmeister series: Na2SO4 > NaCl > NaBr.

Original languageEnglish
Pages (from-to)3825-3828
Number of pages4
JournalPolymer
Volume43
Issue number13
DOIs
Publication statusPublished - Apr 26 2002
Externally publishedYes

Fingerprint

Polymers
Salts
Temperature
Monomers
Phase transitions

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics

Cite this

A novel thermosensitive polymer, poly(methyl 2-propionamidoacrylate), with geminal substituents. / Okamura, Hirokazu; Mori, Takeshi; Minagawa, Keiji; Masuda, Seizo; Tanaka, Masami.

In: Polymer, Vol. 43, No. 13, 26.04.2002, p. 3825-3828.

Research output: Contribution to journalArticle

Okamura, Hirokazu ; Mori, Takeshi ; Minagawa, Keiji ; Masuda, Seizo ; Tanaka, Masami. / A novel thermosensitive polymer, poly(methyl 2-propionamidoacrylate), with geminal substituents. In: Polymer. 2002 ; Vol. 43, No. 13. pp. 3825-3828.
@article{01b0e75dc5364c05a4982e6f8fb7fbe0,
title = "A novel thermosensitive polymer, poly(methyl 2-propionamidoacrylate), with geminal substituents",
abstract = "A novel thermosensitive polymer, poly(methyl 2- propionamidoacrylate) (PMPA), was prepared and the phase transition behavior in an aqueous solution was studied. PMPA have geminal substituents of propionamide and methoxy carbonyl in each monomer unit. It was found that PMPA shows the lower critical solution temperature (LCST) at 50.6°C sharply. The LCST of PMPA was almost independent of the polymer concentration above 40 g/l, while, below 40 g/l, it decreased with the increasing polymer concentration. The effect of salt addition (NaCl, NaBr, and Na2SO4) on the LCST was also studied. The LCST of PMPA linearly decreased with the increasing concentration of each salt. The salting-out effect of these salts was in line with the Hofmeister series: Na2SO4 > NaCl > NaBr.",
author = "Hirokazu Okamura and Takeshi Mori and Keiji Minagawa and Seizo Masuda and Masami Tanaka",
year = "2002",
month = "4",
day = "26",
doi = "10.1016/S0032-3861(02)00186-6",
language = "English",
volume = "43",
pages = "3825--3828",
journal = "Polymer",
issn = "0032-3861",
publisher = "Elsevier BV",
number = "13",

}

TY - JOUR

T1 - A novel thermosensitive polymer, poly(methyl 2-propionamidoacrylate), with geminal substituents

AU - Okamura, Hirokazu

AU - Mori, Takeshi

AU - Minagawa, Keiji

AU - Masuda, Seizo

AU - Tanaka, Masami

PY - 2002/4/26

Y1 - 2002/4/26

N2 - A novel thermosensitive polymer, poly(methyl 2- propionamidoacrylate) (PMPA), was prepared and the phase transition behavior in an aqueous solution was studied. PMPA have geminal substituents of propionamide and methoxy carbonyl in each monomer unit. It was found that PMPA shows the lower critical solution temperature (LCST) at 50.6°C sharply. The LCST of PMPA was almost independent of the polymer concentration above 40 g/l, while, below 40 g/l, it decreased with the increasing polymer concentration. The effect of salt addition (NaCl, NaBr, and Na2SO4) on the LCST was also studied. The LCST of PMPA linearly decreased with the increasing concentration of each salt. The salting-out effect of these salts was in line with the Hofmeister series: Na2SO4 > NaCl > NaBr.

AB - A novel thermosensitive polymer, poly(methyl 2- propionamidoacrylate) (PMPA), was prepared and the phase transition behavior in an aqueous solution was studied. PMPA have geminal substituents of propionamide and methoxy carbonyl in each monomer unit. It was found that PMPA shows the lower critical solution temperature (LCST) at 50.6°C sharply. The LCST of PMPA was almost independent of the polymer concentration above 40 g/l, while, below 40 g/l, it decreased with the increasing polymer concentration. The effect of salt addition (NaCl, NaBr, and Na2SO4) on the LCST was also studied. The LCST of PMPA linearly decreased with the increasing concentration of each salt. The salting-out effect of these salts was in line with the Hofmeister series: Na2SO4 > NaCl > NaBr.

UR - http://www.scopus.com/inward/record.url?scp=0037177707&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037177707&partnerID=8YFLogxK

U2 - 10.1016/S0032-3861(02)00186-6

DO - 10.1016/S0032-3861(02)00186-6

M3 - Article

AN - SCOPUS:0037177707

VL - 43

SP - 3825

EP - 3828

JO - Polymer

JF - Polymer

SN - 0032-3861

IS - 13

ER -