THE EFFECT OF MONOMER POLARITY ON MMA/BA /SODIUM METHACRYLATE EMULSIFIER FREE EMULSION COPOLYMERIZATION

ZHANG Maogen; WENG Zhixue; HUANG Zhiming; PAN Zuren

doi:null

您当前的位置：

首页 >

文章列表页 >

THE EFFECT OF MONOMER POLARITY ON MMA/BA /SODIUM METHACRYLATE EMULSIFIER FREE EMULSION COPOLYMERIZATION

Research Article | 更新时间：2021-03-19

- THE EFFECT OF MONOMER POLARITY ON MMA/BA /SODIUM METHACRYLATE EMULSIFIER FREE EMULSION COPOLYMERIZATION
- Acta Polymerica Sinica Issue 2, Pages: 208-213(1998)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：20 April 1998，
扫描看全文
ZHANG Maogen, WENG Zhixue, HUANG Zhiming, PAN Zuren. THE EFFECT OF MONOMER POLARITY ON MMA/BA /SODIUM METHACRYLATE EMULSIFIER FREE EMULSION COPOLYMERIZATION. [J]. Acta Polymerica Sinica (2):208-213(1998)
DOI：

ZHANG Maogen, WENG Zhixue, HUANG Zhiming, PAN Zuren. THE EFFECT OF MONOMER POLARITY ON MMA/BA /SODIUM METHACRYLATE EMULSIFIER FREE EMULSION COPOLYMERIZATION. [J]. Acta Polymerica Sinica (2):208-213(1998) DOI：

摘要

研究了少量甲基丙烯酸钠（ＮａＭＡ）存在下单体极性对甲基丙烯酸甲酯（ＭＭＡ）／丙烯酸丁酯（ＢＡ）无皂乳液共聚合的影响．单体极性降低

使粒径减小、聚合速率提高、乳液表面张力和粘度降低、粒子表面电荷密度增大、聚合物分子量提高．ＭＭＡ／ＮａＭＡ无皂乳液聚合物只呈现一个玻璃化温度Ｔｇ

ＢＡ／ＮａＭＡ无皂乳液聚合物呈现两个Ｔｇ

ＭＭＡ／ＢＡ比为２∶１～１∶２的ＭＭＡ／ＢＡ／ＮａＭＡ无皂乳液聚合物呈现四个Ｔｇ

这是由于粒子外面相对富含ＯＳＯ－３和ＣＯＯ－基聚合物的亚层溶解了较多的水

使ＢＡ向粒子中心扩散

ＭＭＡ向外扩散

造成组成差异和相分离而引起的．

Abstract

The soapless emulsion copolymerization of methyl methacrylate (MMA) and n- butyl-acrylate (BA) with various ratios of MMA to BA in the presence of small amount of sodium methacrylate (NaMA) was studied.Increasing BA feed fraction results in a decrease of particle diameter

surface tension and viscosity of the latexes

and an increase of particle number

polymerization rate

surface charge density of the latexes and molecular weight of copolymer.The DSC thermogram of MMA/NaMA soapless latex copolymer (SLC) shows one glass transition temperrature(Tg)

while that of BA/NaMA SLC shows two Tg.and those of MMA/BA/NaMA SLCs with the ratio of MMA to BA within 2:1～1:2 show 4Tg.The heterogeneity of copoymer composition for multiple Tg is ascribed to the assumption that the dissolved water in the sublayer surrounding the particle

enriched with-OSO-3 and -COO- groups

will cause the concentration gradients of MMA and BA monomers and phase separation.

关键词

无皂乳液单体极性表面电荷密度分子量玻璃化温度

Keywords

references

更多指标>

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

DYNAMIC MECHANICAL ANALYSIS ON ELECTRON BEAM CURING OF EPOXY RESINS ——INFLUENCE OF THE CHEMICAL STRUCTURE, MOLECULAR WEIGHT AND DISTRIBUTION OF EPOXY RESINS

RELATIONSHIP BETWEEN GLASS TRANSITION TEMPARETURE (Tg) AND MOLECULAR PARAMETERS OF POLYMERS II. Effect of molecular weight on Tg

RELATIONSHIP BETWEEN GLASS TRANSITION TEMPERATURE (Tg) AND MOLECULAR PARAMETERS OF POLYMERS I.Effect of Chain flexibility on Tg

INFLUENCE OF END GROUP ON THE BANDED STRUCTURE OF PLLA SPHERULITES

GLASS TRANSITION TEMPERATURE OF POLYSTYRENE DETERMINED BY DSC REVISITED

Related Author

No data

Related Institution

No data

Postal code：100190
Tel：010-62588927 Email：gfzxb@iccas.ac.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备05002797号-8 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰