Monodisperse Poly(4-vinylpyridine-<italic style="font-style: italic">co</italic>-divinyl benzene/trimethylolpropane trimethacrylate) Microspheres Prepared <italic style="font-style: italic">via</italic> Precipitation Polymerization

Chun-xia Lu; Zong-gui Tang; Jing Wang; Zhi-gen Luo; Xia Chen; Hong-min Li

doi:10.11777/j.issn1000-3304.2016.16071

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Monodisperse Poly(4-vinylpyridine-co-divinyl benzene/trimethylolpropane trimethacrylate) Microspheres Prepared via Precipitation Polymerization

Research Article | 更新时间：2021-03-19

- Monodisperse Poly(4-vinylpyridine-co-divinyl benzene/trimethylolpropane trimethacrylate) Microspheres Prepared via Precipitation Polymerization
- Acta Polymerica Sinica Issue 11, Pages: 1538-1545(2016)
- 作者机构：
  
  新疆农垦科学院分析测试中心农业部食品质量监督检验测试中心(石河子) 石河子 832000
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2016.16071
  CLC：
- Published：2016-11，
  
  Received：10 March 2016，
  
  Revised：25 April 2016，
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Chun-xia Lu, Zong-gui Tang, Jing Wang, Zhi-gen Luo, Xia Chen, Hong-min Li. Monodisperse Poly(4-vinylpyridine-co-divinyl benzene/trimethylolpropane trimethacrylate) Microspheres Prepared via Precipitation Polymerization. [J]. Acta Polymerica Sinica (11):1538-1545(2016)
DOI：

Chun-xia Lu, Zong-gui Tang, Jing Wang, Zhi-gen Luo, Xia Chen, Hong-min Li. Monodisperse Poly(4-vinylpyridine-co-divinyl benzene/trimethylolpropane trimethacrylate) Microspheres Prepared via Precipitation Polymerization. [J]. Acta Polymerica Sinica (11):1538-1545(2016) DOI： 10.11777/j.issn1000-3304.2016.16071.

摘要

以4-乙烯基吡啶(4-VP)为功能单体、二乙烯基苯(DVB)和三羟甲基丙烷三甲基丙烯酸酯(TRIM)为混合交联剂，偶氮二异丁腈(AIBN)为引发剂，乙腈为反应介质，采用沉淀聚合法制备单分散聚合物微球.考察了共聚单体、溶剂、引发剂等聚合条件对聚合物微球粒径、分散性以及产率的影响.并用扫描电镜(SEM)、激光粒度分析仪、热重分析仪和红外光谱对微球进行了表征.结果表明，聚合物微球的表面形貌和产率可通过改变溶剂体积、单体/交联剂摩尔比和引发剂浓度等因素进行控制.降低乙腈溶液体积、增加DVB摩尔比例及交联剂摩尔比、可增加聚合物粒径及粒度分布均匀性，而聚合物产率随溶剂体积和DVB摩尔比增大而减小，随交联剂摩尔比和引发剂浓度的增加而增加.在最优条件下，即DVB和TRIM两者摩尔比4：1，单体/交联剂摩尔比1：5，乙腈用量为5.6 mL(单体和交联剂占介质体积的7%)，引发剂浓度为2 wt%~6 wt%(占总反应单体的量)时，可获得形貌规则、产率较高的单分散poly(4-VP-

-DVB/TRIM)微球，微球平均粒径约4.02 μm，粒径分布指数(

)为1.013.此外，热重分析结果显示，聚合微球于350℃时开始分解，600℃时失重率达84.9%.

Abstract

Monodisperse poly-(4-vinylpyridine-

-divinyl benzene/trimethylolpropane trimethacrylate) (poly-(4-VP-

-DVB/TRIM)) microspheres with smooth surface were successfully prepared by precipitation polymerization in acetonitrile with 4-vinylpyridine (4-VP)

divinyl benzene (DVB) and trimethylolpropane trimethacrylate (TRIM) as comonomers

2-azobisisobutyronitrile (AIBN) as initiator.Effects of the polymerization conditions

such as comonomer ratio

solvents and initiator amount

on the morphology and yield of polymer microspheres were also investigated.The prepared polymers were characterized by scanning electron microscopy (SEM)

Fourier transform infrared (FTIR)

thermal gravimetric analysis (TGA) and particle size analysis.Results showed that polymerization parameters (including solvent type and amount

molar ratio of cross-linker to comonomer

ratio of the cross-linkers DVB to TRIM and initiator concentrations) had significant influence on the morphologies and yield of the resulting polymer microspheres.Particle size and uniformity of polymer increased with decreasing acetonitrile amount while increases in cross-linker and initiator loading caused larger particle sizes.The polymer yield increased gradually with the increases in the concentration of initiator and molar ratio of cross-linker

and decreased with the increase in the amount of the acetonitrile and molar ratio of cross-linker.When molar ratio of 4-VP:(DVB+TRIM) was 1:5 and DVB:TRIM was 4:1

with 2 wt%-6 wt% of AIBN as initiator (based on all monomer weight)

5.6 mL of acetonitrile as solvent

reaction temperature at 65℃

reaction time for 24 h

monodisperse poly-(4-VP-

-DVB/TRIM) microspheres with better spherical shape and high yields were obtained

and the average diameters and polydispersity index of the polymer microspheres were 4.02 μm and 1.024

respectively.Moreover

thermal gravimetric analysis showed that the weight loss for polymer microspheres in the temperature range of 320-500℃

and 84.9% of its initial mass was lost at 600℃

which gave the polymer microspheres great potential to be used as functional materials.

关键词

沉淀聚合聚合物微球4-乙烯基吡啶(4-VP)二乙烯基苯(DVB)三羟甲基丙烷三甲基丙烯酸酯(TRIM)

Keywords

Precipitation polymerizationPolymer microspheres4-VinylpyridineDivinyl benzeneTrimethylolpropane trimethacrylate

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College of Chemistry and Chemical Engineering, University of Jinan

Shandong Institute for Product Quality Inspection

College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University

Laboratory of Polymer Physics and Chemistry, Beijing National Laboratory of Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences

State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Tianjin Polytechnic University

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Monodisperse Poly(4-vinylpyridine-co-divinyl benzene/trimethylolpropane trimethacrylate) Microspheres Prepared via Precipitation Polymerization

DOI：10.11777/j.issn1000-3304.2016.16071

摘要

Abstract

关键词

Keywords

references