温敏性聚甲基丙烯酸二甲氨基乙酯季铵盐制备及性质研究

doi:10.3969/j.issn.1001-1803.2021.05.009

Abstract

Abstract:

Polydimethylaminoethyl methacrylate （PDMAEMA） homopolymer was prepared by reversible addition fragmentation chain transfer polymerization method, and a series of PDMAEMA quaternary ammonium salts with different degrees of quaternization were synthesized by quaternization with benzyl bromide. The products were characterized by NMR spectroscopy, gel permeation chromatography, surface tension test, dynamic light scattering and Zeta potential analysis were carried out for studying their properties. The results show that PDMAEMA and polyquaternary ammonium salts have been successfully prepared. The aryl quaternized PDMAEMA has excellent surface activity, and the degree of quaternization has little effect on its minimum surface tension. The particle size of the quaternized particles above 40% is obviously increased. As the degree of quaternization increases, the temperature responsibility of PDMAEMA quaternary ammonium salt gradually disappears.

Key words: poly（dimethylaminoethyl methacrylate）, quaternary ammonium, temperature-sensitivity, surface activity

CLC Number:

TQ423

ZHONG Guo-yuan,ZHANG Li-ming,HU Dong-min,PENG Hua-nan,YANG Yan-chun,ZHENG Jie. Study on preparation and properties of thermal responsive poly （dimethylaminoethyl methacrylate） quaternary ammonium[J].China Surfactant Detergent & Cosmetics, 2021, 51(5): 428-432.

Figures/Tables 7

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Tab. 2

References 14

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样品名称	m（PDMAEMA）/g	m（BzBr）/g	m（EtOH）/g
PDMAEMAQA_5%	3.00	0.15	23.67
PDMAEMAQA_10%	3.00	0.30	23.67
PDMAEMAQA_15%	3.00	0.45	23.67
PDMAEMAQA_20%	3.00	0.60	23.67
PDMAEMAQA_40%	3.00	1.20	23.67
PDMAEMAQA_60%	3.00	1.80	23.67

样品名称	粒径/nm	PDI	Zeta电位/mV	LCST/℃
PDMAEMA	245	0.259	+15.26	38
PDMAEMAQA_5%	282	0.225	+16.27	44
PDMAEMAQA_10%	333	0.261	+17.93	46
PDMAEMAQA_15%	327	0.234	+19.22	47
PDMAEMAQA_20%	321	0.208	+21.02	—
PDMAEMAQA_40%	680	0.286	+26.35	—
PDMAEMAQA_60%	654	0.251	+33.24	—

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Study on preparation and properties of thermal responsive poly （dimethylaminoethyl methacrylate） quaternary ammonium

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