ANCHORING OF AZO INITIATOR AND GRAFTING OF POLY(METHYL METHACRYLATE) ONTO NANAOMETER SILICA

QI Dongming; BAO Yongzhong; HUANG Zhiming; WENG Zhixue

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ANCHORING OF AZO INITIATOR AND GRAFTING OF POLY(METHYL METHACRYLATE) ONTO NANAOMETER SILICA

Research Article | 更新时间：2021-03-19

- ANCHORING OF AZO INITIATOR AND GRAFTING OF POLY(METHYL METHACRYLATE) ONTO NANAOMETER SILICA
- Acta Polymerica Sinica Issue 3, Pages: 415-418(2004)
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- Published：20 June 2004，
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QI Dongming, BAO Yongzhong, HUANG Zhiming, WENG Zhixue. ANCHORING OF AZO INITIATOR AND GRAFTING OF POLY(METHYL METHACRYLATE) ONTO NANAOMETER SILICA. [J]. Acta Polymerica Sinica (3):415-418(2004)
DOI：

QI Dongming, BAO Yongzhong, HUANG Zhiming, WENG Zhixue. ANCHORING OF AZO INITIATOR AND GRAFTING OF POLY(METHYL METHACRYLATE) ONTO NANAOMETER SILICA. [J]. Acta Polymerica Sinica (3):415-418(2004) DOI：

摘要

对纳米SiO2 粒子锚固偶氮引发剂

进而引发甲基丙烯酸甲酯聚合而制备聚甲基丙烯酸甲酯(PMMA) 纳米SiO2 复合粒子进行了研究 .纳米SiO2 先用环氧型硅烷偶联剂处理

再与偶氮二氰基戊酸发生缩合反应而锚固上偶氮引发剂

通过差示扫描量热和元素分析证明了引发剂在纳米SiO2 表面的锚固 .通过改性纳米SiO2 存在下MMA的乳液聚合

制备得到了接枝率为 23.2 %、接枝效率为 36.1%的PMMA 纳米SiO2 复合粒子 .经乳液聚合后

纳米SiO2 粒子团聚程度减小

在水相中分散稳定.

Abstract

Anchoring of 4

4'-azobis(4-cyanopenlanoic acid) (ACPA) onto nanometer silica and radical graft polymerization of methyl methacrylate (MMA) from the modified silica throush emulsion polymerization were investigated．The anchoring of ACPA onto silica was achieved by treating of silica with glycidoxypropyl-trimethoxysilane and reacting with ACPA．The anchoring of ACPA was confirmed by DSC and element analysis．Poly (methyl methacrylate) (PMMA) was effectively grafted onto nanometer silica throughe initiation of anchored ACPA during emulsion polymerization．The grafting percentnge and efficiency of PMMA were 23.2％ and 36.1％ determined by TGA．Furthermore

the aggregation degree of the original nanometcr silica was decreased by in-situ polymerization

and the stability of PMMA/nano-silica composite latex was good．

关键词

纳米SiO2甲基丙烯酸甲酯乳液聚合偶氮二氰基戊酸锚固接枝

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1Department of Polymeric Materials and Engineering,College of Material and Energy,Guangdong University of Technology

汕头大学理学院化学系

汕头大学理学院化学系广州510006汕头大学理学院化学系汕头

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