高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (6): 1401.

• 研究论文 • 上一篇    下一篇

预聚物复合助稳定剂条件下含氟丙烯酸酯共聚物的细乳液聚合

姚宁宁, 倪刚, 赵炜珍, 许美茹, 杜娟   

  1. 宁夏大学化学化工学院, 宁夏能源化工重点实验室, 银川 750021
  • 收稿日期:2010-07-23 修回日期:2010-09-29 出版日期:2011-06-10 发布日期:2011-05-10
  • 通讯作者: 倪刚 E-mail:nigang@nxu.edu.cn
  • 基金资助:

    宁夏自然科学基金(批准号: NZ0718, NZ0815), 宁夏大学自然科学研究基金(批准号: ZR0621)和宁夏高等学校科学技术研究项目资助.

Miniemulsion Polymerization by Predissolved Polymer as Costabilizer

YAO Ning-Ning, NI Gang*, ZHAO Wei-Zhen, XU Mei-Ru, DU Juan   

  1. Key Laboratory of Energy Resources and Chemical Engineering, College of Chemistry & Chemical Engineering, Ningxia University, Yinchuan 750021, China
  • Received:2010-07-23 Revised:2010-09-29 Online:2011-06-10 Published:2011-05-10
  • Contact: NI Gang E-mail:nigang@nxu.edu.cn
  • Supported by:

    宁夏自然科学基金(批准号: NZ0718, NZ0815), 宁夏大学自然科学研究基金(批准号: ZR0621)和宁夏高等学校科学技术研究项目资助.

摘要: 以甲基丙烯酸三氟乙酯(TFMA)、苯乙烯(St)和丙烯酸丁酯(BA)为共聚单体,在十二烷基硫酸钠(SDS)/磺酸盐型阴离子氟表面活性剂(S100)/异辛基苯基聚氧乙烯醚(OP)组成的乳化体系下,采用预聚物和十六醇(HDL)共同组成的复合助稳定剂,对细乳液聚合制备St/BA/TFMA三元共聚物的过程进行了研究。通过FT-IR、1H-NMR、DSC、TGA、GPC等对共聚物的结构与性质进行表征和确认。研究了影响细乳液聚合转化率和凝聚率的各种因素,确定了复合乳化剂的配比为m(OP):m(SDS):m(S100)=2.5:1:0.3、预聚物和助乳化剂HDL的用量分别为单体总量的0.5%和2%的条件下可以制备出稳定性较好的细乳液体系,制备的乳胶膜具有良好的疏水性和耐候性。

关键词: 细乳液聚合, 含氟丙烯酸酯, 助稳定剂, 乳胶膜, 预聚物

Abstract: A steady miniemulsion copolymer of trifluoroethyl methacrylate(TFMA), n-buty acrylate(BA) and styrene(St) was prepared by using predissolved polymer and hexanediol (HDL) as a costabilizer, AIBN as initiator, SDS/S100/OP as a complex emulsion system. The relationships of polymerization conditions between the final conversion and polymerization stability were discussed in detail. The optimal polymerization condition is 0.7% AIBN, 2% HDL, 0.5% predissolved polymer and m(OP):m(SDS):m(S100) = 2.5:1:0.3. The molecular weight and composition of copolymer were demonstrated by GPC, FT-IR, 1H-NMR, DSC and TGA. The result was showed that HFMA is effectively involved in the copolymerization, the fluorinated acrylate copolymer has a narrower molecular weight distribution. Add a small amount of predissolved polymer can not only improved the emulsion stability but also improved the hydrophobic properties of latex films. After perfluoroalkyl groups were introduced into polymer chains, the wetting-resistance, the water-resistance and the thermal stability of the latex films were evidently enhanced.

Key words: Miniemulsion polymerization, Fluorinated acrylate, Costabilizer, Latex films, Predissolved polymer

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