马来酸酯磺酸盐型活性聚合物的合成及性能研究

doi:10.3969/j.issn.1001-1803.2019.02.003

Abstract

Abstract:

Based on the relationship between the molecular structure and the properties of polymers, maleic anhydride （MA） , polyethylene glycol （PEG） and octanol were used as main raw materials to synthesize active monomers （MOPn） . The active monomers then reacted with 2-acrylamido-2-methylpropane sulfonic acid （AMPS） and acrylamide （AM） to obtain binary and ternary polymers containing -SO₃ ^-, -CONH₂ and oxethyl （EO） groups by free radical micellar copolymerization. The structure and thermal stability of terpolymers were characterized by IR and differential thermal analysis （DTA）, respectively. The surface activities of polymers in distilled water and in the presence of inorganic salt in aqueous medium were evaluated. The effects of the monomer ratio on properties were also discussed. The results show that the synthesized bipolymer （PMOPnS） has good water solubility and surface activity, and the bipolymer with molar ratio of active monomers （MOP1000∶AMPS） of 1∶2 has a lower surface tension than the one with a molar ratio of 1∶4. The terpolymer becomes to decompose above 258 ℃. The effects of the molar ratio of monomers and the salt mass concentration on the viscosity of terpolymer solution were investigated. PMOPSA-1, a terpolymer of n（MOP1000） ∶n（AMPS） ∶n（AM）=0.5∶1∶98.5, has good thickening effect and surface/interfacial activity. The viscosities of 2% terpolymer in distilled water and in 2% NaCl solution at 30 ℃ are 1 108 and 1 157 mPa·s, respectively. The surface tension at 30 ℃ and the interfacial tension against kerosene at 45 ℃ for 2% aqueous terpolymer solution in the presence of 2%NaCl+0.1%CaCl₂ are 30.43 and 2.09 mN/m, respectively, indicating that PMOPSA-1 has good thermal stability, thickening property and surface/interfacial activity.

Key words: maleate, 2-acrylamido-2-methylpropane sulfonic acid /acrylamide copolymer, micellar polymeri-zation, surface activity, viscosity

CLC Number:

TQ423

Ge XU,Yan-cheng ZHENG,Ping-nan YUAN,Heng ZHENG. Synthesis and solution properties of polymeric sulfomaleate surfactants[J].China Surfactant Detergent & Cosmetics, 2019, 49(2): 76-82.

Figures/Tables 9

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References 17

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PEG分子量	cmc/（mg·L^-1）		γ_cmc/（mN·m^-1）
PEG分子量	蒸馏水	1% NaCl	蒸馏水	1% NaCl
600	4 918	4 884	31.21	31.13
1 000	2 747	2 654	35.18	34.65
2 000	6 310	5 248	43.14	41.64

PEG分子量	cmc/（mg·L^-1）		γ_cmc/（mN·m^-1）
PEG分子量	蒸馏水	1% NaCl	蒸馏水	1% NaCl
600	4 468	3 763	30.27	30.21
1 000	1 435	1 371	31.64	31.05
2 000	6 510	6 233	41.11	39.74

聚合物	n（MOP1000）∶n（AMPS）∶n（AM）	表观黏度/（mPa·s）	特性黏度/（mL·g^-1）
HPAM		4 181	968
PMOPSA-1	0.5∶1∶98.5	1 108	2 145
PMOPSA-2	0.5∶1∶23.0	222	1 671
PMOPSA-3	0.5∶1∶4.8	66	1 091
PMOPSA-4	0.5∶1∶3.5	59	1 161
PMOPSA-5	0.5∶1∶1.8	10	490

聚合物	表面张力/（mN·m^-1）	界面张力/（mN·m^-1）
PMOPSA-1	30.43	2.09
PMOPSA-2	30.40	2.02
PMOPSA-3	30.58	1.84
PMOPSA-4	30.48	1.70
PMOPSA-5	30.91	1.68
HPAM	58.73	5.85

Synthesis and solution properties of polymeric sulfomaleate surfactants

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