Thermoresponsivity of polymer solution derived from a self-attractive urea unit and a self-repulsive lipophilic ion unit

被引：9

作者：

Amemori, Shogo ^{[1
]}

Iseda, Kazuya ^{[1
]}

Anan, Shizuka ^{[1
]}

Ono, Toshikazu ^{[2
]}

Kokado, Kenta ^{[1
,3
]}

Sada, Kazuki ^{[1
,3
]}

机构：

[1] Hokkaido Univ, Grad Sch Chem Sci & Engn, Kita Ku, Kita10 Nishi8, Sapporo, Hokkaido 0600810, Japan

[2] Kyushu Univ, Grad Sch Engn, Nishi Ku, Motooka 744, Fukuoka 8190395, Japan

[3] Hokkaido Univ, Fac Sci, Kita Ku, Kita10 Nishi8, Sapporo, Hokkaido 0600810, Japan

来源：

POLYMER CHEMISTRY | 2017年 / 8卷 / 26期

关键词：

CRITICAL SOLUTION TEMPERATURE; CHARGE-TRANSFER INTERACTION; NONPOLAR ORGANIC-SOLVENTS; PHASE-TRANSITION BEHAVIOR; AQUEOUS-SOLUTION; BIOMEDICAL APPLICATIONS; POLYELECTROLYTE GELS; RESPONSIVE POLYMERS; POLY(VINYL ETHER)S; MOLECULAR DESIGN;

D O I：

10.1039/c7py00591a

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The preparation of the polymers having a self-attractive urea unit via hydrogen bonding and a selfrepulsive lipophilic ion unit via electrostatic interaction was carried out to achieve the thermoresponsivity of polymer solution. The solubility of the obtained copolymers depended on the balance between the attractive force induced by hydrogen bonding among the urea units and the repulsive force attributed to the dissociation of the ionic units. In aprotic and nonpolar solvents, the solubility of the polymers was changed from insoluble to soluble with the increasing content of the ionic units. Moreover, in acetonitrile and 1,2-dichloroethane, the UCST-type thermoresponsivity was observed. This result indicated that the UCST-type thermoresponsivity was induced by cleavage of the hydrogen bonds among urea units upon heating, and at the cloud point, the repulsive force among the ionic units overwhelmed the attractive force. From the result of this research, we would like to emphasize that the combination of a lipophilic ion pair and other self-attractive units can be a simple principle for the molecular design of UCST-type thermoresponsive polymers in any media.

引用

页码：3921 / 3925

页数：5

共 53 条

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