Synthesis of vinyltrimethoxysilane hydrophobically modified acrylic acid in supercritical carbon dioxide and its solution properties

ZHANG Huaiping; XU Kai; CHEN Dehong; ZHENG Qiukai; ZHU Linhua; CHEN Mingcai

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Synthesis of vinyltrimethoxysilane hydrophobically modified acrylic acid in supercritical carbon dioxide and its solution properties

更新时间：2025-12-10

- Synthesis of vinyltrimethoxysilane hydrophobically modified acrylic acid in supercritical carbon dioxide and its solution properties
- CIESC Journal Issue 10, Pages: 2663-2667(2008)
- 作者机构：
  
  1. 中国科学院广州化学研究所
  2. 太原理工大学材料科学与工程学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 October 2008，
  
  Published：05 October 2008
- 稿件说明：
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ZHANG Huaiping, XU Kai, CHEN Dehong, et al. Synthesis of vinyltrimethoxysilane hydrophobically modified acrylic acid in supercritical carbon dioxide and its solution properties[J]. CIESC Journal, 2008, (10): 2663-2667.
DOI：

ZHANG Huaiping, XU Kai, CHEN Dehong, et al. Synthesis of vinyltrimethoxysilane hydrophobically modified acrylic acid in supercritical carbon dioxide and its solution properties[J]. CIESC Journal, 2008, (10): 2663-2667. DOI：

摘要

在超临界二氧化碳介质中，通过自由基沉淀聚合反应合成了一系列不同乙烯基三乙氧基硅烷（VTEOS）、丙烯酸十八酯（ODA）含量的丙烯酸疏水缔合丙烯酸聚合物。采用扫描电镜、红外光谱、滴定法和旋转黏度计对共聚物的形貌、组成及溶液性质进行了表征。实验结果表明共聚物形貌是由直径小于1 μm左右的球形颗粒组成。在疏水单体含量小于1%(mol)时，VTEOS疏水改性聚合物的黏度大于ODA疏水改性聚合物的黏度。在VTEOS含量为0.2%(mol)时，通过硅氧烷间化学反应，硅氧烷改性丙烯酸聚合物溶液黏度达到2400 mPa·s。

Abstract

Associated polymers were synthesized in supercritical carbon dioxide by precipitation copolymerization of acrylic acid with different amounts of octadecyl acrylate or vinyltrimethoxysilane. The morphology

composition and solution properties of the copolymer were studied with scanning electron microscopy (SEM)

FT-IR

titration

rotational viscometerSEM measurement indicated that the diameter of the primary particle was less than 1 μmThe viscosity of poly (AA-co-VTEOS) was higher than that of poly (AA-co-ODA) when the ratio of VTEOS in copolymer was less than 1%(mol).It indicated that chemical reaction with VTEOS can increase solution viscosity at a low VTEOS content in copolymerThe viscosity of poly(AA-co-VTEOS) was 2400 mPa·s when VTEOS content in copolymer was 0.2%(mol).

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