PREPARATION OF MULTIHOLLOW PARTICLES BY SEEDED EMULSION COPOLYMERIZASION

KAN Chengyou; LI Huihui; SUN Jin; YUAN Qing; KONG Xiangzheng

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PREPARATION OF MULTIHOLLOW PARTICLES BY SEEDED EMULSION COPOLYMERIZASION

Research Article | 更新时间：2021-03-19

- PREPARATION OF MULTIHOLLOW PARTICLES BY SEEDED EMULSION COPOLYMERIZASION
- Acta Polymerica Sinica Issue 2, Pages: 199-204(1999)
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- Published：20 April 1999，
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KAN Chengyou, LI Huihui, SUN Jin, YUAN Qing, KONG Xiangzheng. PREPARATION OF MULTIHOLLOW PARTICLES BY SEEDED EMULSION COPOLYMERIZASION. [J]. Acta Polymerica Sinica (2):199-204(1999)
DOI：

KAN Chengyou, LI Huihui, SUN Jin, YUAN Qing, KONG Xiangzheng. PREPARATION OF MULTIHOLLOW PARTICLES BY SEEDED EMULSION COPOLYMERIZASION. [J]. Acta Polymerica Sinica (2):199-204(1999) DOI：

摘要

用批量乳液聚合法制备了苯乙烯（Ｓｔ）———甲基丙烯酸甲酯（ＭＭＡ）二元共聚种子乳液Ｓ１以及Ｓｔ-ＭＭＡ丙烯酸（ＡＡ）三元共聚种子乳液Ｓ２

通过连续法无皂种子乳液聚合合成了一系列不同ＡＡ或ＭＡＡ（甲基丙烯酸）含量的Ｓｔ、ＭＭＡ三元共聚乳液．将所得复合胶乳进行碱／酸分步处理

得到具有多孔结构的乳胶粒．用透射电镜对胶粒形态进行了表征

考察了不饱和酸种类和用量、碱处理初始ｐＨ值及溶胀剂对胶粒成孔的影响．

Abstract

Seed latex S1 consisting of styrene(St) and methyl methacrylate(MMA)

and S2 consisting of St. MMA and AA(acrylic acid)

were first prepared by batch process

then a series of St MMA-AA or MAA(methyl methacrylate) terpolymer latexes containing different amount of unsaturated acid monomers were synthesized by continuous seeded emulsion copolymerization in the absence of emulsifiers

and the composite latexes were then treated by alkali and acid subsequently at 90℃ for 3h. Particle size and morphologies were characterized by TEM using phosphotungstic acid as staning agent.The influence of swelling agent MEK(methyl methacrylate) and the initial pH value in the alkali treatment on the formation of multihollow were investigated.Experiments showed that multihollow particles

accompanied by the largest volume expansion

were observed after treatments for S1/P(St-MMA-AA) using 8.0% mole of AA in the second step monomers.At the present conditions.AA is more suitable than MAA to prepare the desired multihollow latexes particles

and seed latex S1 is more effective than S2 on the forming multihollow structure in latex particles.

关键词

多孔乳胶粒种子乳液聚合胶粒形态苯乙烯不饱和酸

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