Abstract
This letter describes the phase behavior of aqueous solutions of an N-isopropylacrylamide (NIPAM) homopolymer and copolymers of N,N?- diisopropylfumaramide (DIPFAM) and NIPAM as studied by transmittance measurements, infrared spectroscopy, and differential scanning calorimetry to reveal the effect of the density of N-isopropylamide side chain upon the phase behavior. The clouding-point and clearing-point temperatures decreased with increasing the mole fraction of DIPFAM (x D). It was noteworthy that only an extra side chain per ca. 7 NIPAM units had a remarkable effect on the phase behavior; the interactions between side chains were stronger, the intrapolymer contraction was less favorable, and the cooperativity of phase transition was lower at x D = 0.15 presumably because of the steric hindrance of dense side chains.
| Original language | English |
|---|---|
| Pages (from-to) | 5522-5526 |
| Number of pages | 5 |
| Journal | Langmuir |
| Volume | 28 |
| Issue number | 13 |
| DOIs | |
| Publication status | Published - Apr 3 2012 |
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All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Surfaces and Interfaces
- Spectroscopy
- Electrochemistry
Cite this
Phase behavior of aqueous solutions of copolymers of N, N?-diisopropylfumaramide and N -isopropylacrylamide : Effect of the density of side chains. / Hashidzume, Akihito; Matsumoto, Akiko; Mori, Takeshi; Shikata, Toshiyuki; Sato, Takahiro.
In: Langmuir, Vol. 28, No. 13, 03.04.2012, p. 5522-5526.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Phase behavior of aqueous solutions of copolymers of N, N?-diisopropylfumaramide and N -isopropylacrylamide
T2 - Effect of the density of side chains
AU - Hashidzume, Akihito
AU - Matsumoto, Akiko
AU - Mori, Takeshi
AU - Shikata, Toshiyuki
AU - Sato, Takahiro
PY - 2012/4/3
Y1 - 2012/4/3
N2 - This letter describes the phase behavior of aqueous solutions of an N-isopropylacrylamide (NIPAM) homopolymer and copolymers of N,N?- diisopropylfumaramide (DIPFAM) and NIPAM as studied by transmittance measurements, infrared spectroscopy, and differential scanning calorimetry to reveal the effect of the density of N-isopropylamide side chain upon the phase behavior. The clouding-point and clearing-point temperatures decreased with increasing the mole fraction of DIPFAM (x D). It was noteworthy that only an extra side chain per ca. 7 NIPAM units had a remarkable effect on the phase behavior; the interactions between side chains were stronger, the intrapolymer contraction was less favorable, and the cooperativity of phase transition was lower at x D = 0.15 presumably because of the steric hindrance of dense side chains.
AB - This letter describes the phase behavior of aqueous solutions of an N-isopropylacrylamide (NIPAM) homopolymer and copolymers of N,N?- diisopropylfumaramide (DIPFAM) and NIPAM as studied by transmittance measurements, infrared spectroscopy, and differential scanning calorimetry to reveal the effect of the density of N-isopropylamide side chain upon the phase behavior. The clouding-point and clearing-point temperatures decreased with increasing the mole fraction of DIPFAM (x D). It was noteworthy that only an extra side chain per ca. 7 NIPAM units had a remarkable effect on the phase behavior; the interactions between side chains were stronger, the intrapolymer contraction was less favorable, and the cooperativity of phase transition was lower at x D = 0.15 presumably because of the steric hindrance of dense side chains.
UR - http://www.scopus.com/inward/record.url?scp=84859463454&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84859463454&partnerID=8YFLogxK
U2 - 10.1021/la300934g
DO - 10.1021/la300934g
M3 - Article
C2 - 22424075
AN - SCOPUS:84859463454
VL - 28
SP - 5522
EP - 5526
JO - Langmuir
JF - Langmuir
SN - 0743-7463
IS - 13
ER -