THERMOTROPIC AQUEOUS GELS AND SOLUTIONS OF N,N-DIMETHYLACRYLAMIDE ACRYLATE COPOLYMERS
THERMOTROPIC AQUEOUS GELS AND SOLUTIONS OF N,N-DIMETHYLACRYLAMIDE ACRYLATE COPOLYMERS
复制标题
DOI：
10.1016/0032-3861(92)91105-b
复制
发表时间：
1992-01-01
期刊：
影响因子：
4.6
通讯作者：
MUELLER, KF
中科院分区：
文献类型：
--
作者：
MUELLER, KF
N，N-二甲基丙烯酰胺(DMA)与C_1-C_4烷基和烷氧基乙基丙烯酸酯的共聚物-形成临界溶液温度(LCST)在0-100℃之间较低的水溶液。作为弱交联性凝胶，它们随着温度的升高表现出较强的浊点和体积收缩。DMA与高烷基丙烯酸酯的共聚物不溶于0摄氏度，但形成具有较强浊点的水塑料和水凝胶。LCST由共聚单体的疏水性和含量决定。这些共聚物能够与LCST形成水溶液的能力可以归因于一种随机的共聚物结构，这种结构允许从完全水化的聚合物突然转变为以疏水相互作用为主的聚合物。
Copolymers of N,N-dimethylacrylamide (DMA) with C1-C4 alkyl and alkoxyethyl acrylates-form aqueous solutions with lower critical solution temperatures (LCST) between 0 and 100-degrees-C. As weakly crosslinked gels they exhibit strong cloud points and volume shrinkage with rising temperature. Copolymers of DMA with higher alkyl acrylates are insoluble down to 0-degrees-C, but form hydroplastics and hydrogels with strong cloud points. The LCST is determined by the hydrophobicity and amount of comonomers. The ability of these copolymers to form aqueous solutions with LCSTs can be attributed to a random copolymer structure, which allows an abrupt phase transition from a fully hydrated to a predominantly hydrophobically interacting polymer.