Citation: LIU Jian-Xin, GUO Yong-Jun, ZHU Yang-Wen, YANG Hong-Ping, YANG Xue-Shan, ZHONG Jin-Hang, LI Hua-Bing, LUO Ping-Ya. Polymerization of Micro-Block Associative Polymer with Alcohol-Surfmer Mixed Micellar Method and Their Rheological Properties[J]. Acta Physico-Chimica Sinica, 2012, 28(07): 1757-1763. doi: 10.3866/PKU.WHXB201204231
醇-可聚合表面活性剂混合胶束法合成微嵌段缔合聚合物及其流变性
低碳醇与可聚合表面活性剂(surfmer)可以形成混合胶束, 本文通过稳态荧光猝灭法(SSFQ)测定了该混合胶束中可聚合表面活性剂的聚集数, 并通过绝热聚合和后水解工艺合成出不同微嵌段长度的较高分子量(Mw)缔合聚合物聚(丙烯酰胺-丙烯酸钠-十六烷基二甲基烯丙基氯化铵)[P(AM-NaAA-C16DMAAC)]. 聚合物结构经傅里叶变换-红外(FT-IR)光谱和核磁共振碳谱(13C NMR)表征证实, 并通过流变性实验研究了微嵌段长度对增粘性能、抗盐性能、粘弹性能的影响规律. 实验结果表明: 该方法可以有效调节缔合聚合物中微嵌段的长度, 随着微嵌段长度增加, 临界缔合浓度(CAC)逐渐降低, 增粘性能、粘弹性能先逐步增加后逐步降低, 并且发现其对聚合物的性能的影响规律中存在最佳嵌段长度.
English
Polymerization of Micro-Block Associative Polymer with Alcohol-Surfmer Mixed Micellar Method and Their Rheological Properties
In this paper, mixed micelle composed of alcohol and polymerizable surfactant (surfmer) were constructed. The aggregated numbers of surfmer (hexadecyl trimethyl allylammonium chloride (C16DMAAC)) in the mixed micelle were measured using a steady-state fluorescence quenching (SSFQ) technique. Using a mixed micellar method with adiabatic polymerization and post-hydrolyzation techniques, the high molecular weight (Mw) micro-block associative polymer of P(AM-NaAA-C16DMAAC) was polymerized. Structures were characterized by Fourier transform-infrared (FT-IR) spectroscopy and 13C nuclear magnetic resonance (NMR) spectroscopy. Using rheological experiments, the effects of micro-block length and salt concentration of on the thickening and viscoelastic rheological properties of the polymers were studied. All experiments confirmed that the micro-block length could be adjusted using the mixed micellar method. Increases in the micro-block length were accompanied by decreases in the critical associative concentration (CAC). The viscosities and viscoelastic rheological properties increased to maximum then decreased steady with the length increasing, indicating that the length was at an optimum value.
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Key words:
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Alcohols
- / Polymerizable surfactant
- / Associative polymer
- / Micro-block length
- / Mixed micelle
- / Rheology
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