SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF MAn-PO COPOLYMER PREPARED BY RARE EARTH COORDINATION CATALYST

CHEN Xian-hai; ZHANG Yi-feng; SHIN Zhi-quan

doi:null

您当前的位置：

首页 >

文章列表页 >

SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF MAn-PO COPOLYMER PREPARED BY RARE EARTH COORDINATION CATALYST

Research Article | 更新时间：2021-03-19

- SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF MAn-PO COPOLYMER PREPARED BY RARE EARTH COORDINATION CATALYST
- Acta Polymerica Sinica Issue 1, Pages: 70-75(1994)
- 作者机构：
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：20 February 1994，
扫描看全文
CHEN Xian-hai, ZHANG Yi-feng, SHIN Zhi-quan. SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF MAn-PO COPOLYMER PREPARED BY RARE EARTH COORDINATION CATALYST. [J]. Acta Polymerica Sinica (1):70-75(1994)
DOI：

CHEN Xian-hai, ZHANG Yi-feng, SHIN Zhi-quan. SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF MAn-PO COPOLYMER PREPARED BY RARE EARTH COORDINATION CATALYST. [J]. Acta Polymerica Sinica (1):70-75(1994) DOI：

摘要

本文将稀土络合物Ｎｄ（Ｐ２０４）３、Ｎｄ（Ｐ５０７）３、Ｎｄ（ｎａＰｈ）３、Ｎｄ（ａｃａｃ）３．３Ｈ２Ｏ与烷基铝组成的二元体系催化剂用于共聚马来酸酐（ＭＡｎ）与环氧丙烷（ＰＯ）获得成功．并采用１Ｈ—ＮＭＲ研究了共聚物三元组序列分布．结果表明，稀土络合催化剂为ＭＡｎ与ＰＯ共聚的优良催化刑，可得到高转化率、高交替度共聚物．共聚物数均分子量Ｍｎ和分子量分布分别为２０００—３０００、１．３—１．７，共聚物中ＭＡｎ的摩尔含量４０％以上．共聚物组成及序列分布与投料比、催化剂种类、溶剂性质等有关．理论计算表明，序列分布符合三级马尔可夫（Ｍａｒｋｏｆｆｉａｎ）过程．

Abstract

Ring - opening copolymerization of maleic anhydride alAn ) with propylene oxide (PO) was successfully caacced out by using rare earth complexes (i. e.

Nd (P204)3

Nd (P507)3

Nd (naph)3 and Nd(acac)3 3H2O ) in combinationwith aluminum alkyls as catalysts for the first time. The relative concentration oftriads of the MAn-PO copolylner obtained was investigated on the basis of1H-NMR in devil. The results showed that the rare earth coordination systemswere favourable catalysts for the copolymerizahon of MAn with PO

giving high yield and almost alternating opolymer. The number- average molecular weight and molecular weight distribution were in the range of 2000-3000 and 1.3-1.7 respectively. The composition and the monomer distribution were affect-ed by the monomer charge ratio

the sort of catalyst

and the property of solvent.It was also found that the monmer composition of copolymer predicted from the thire- order Markoffian process fit the observed 1H-NMR data perfectly.

关键词

稀土络合物开环共聚马来酸酐环氧丙烷序列分布

Keywords

references

更多指标>

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

EFFECTS OF REACTION TIME AND PRESSURE ON THE COPOLYMERIZATION OF CARBON DIOXIDE AND PROPYLENE OXIDE USING SUPPORTED ZINC GLUTARATE CATALYST

Grafting of Maleic Anhydride onto Hyperbranched Polyethylene and Suppression of Chain Degradation and Crosslinking Side Reactions

CHEMICAL SURFACE MODIFICATION AND HEPARINIZATION OF POLY(p-XYLYLENE) MEMBRANES

CHARACTERIZATION AND TERPOLYMERIZATION OF CARBON DIOXIDE/PROPYLENE OXIDE/γ-BUTYROLACTONE

RADIATION GRAFTING OF STYRENE/MALEIC ANHYDRIDE OR STYRENE/DIMETHYLAMINO ETHYL METHACRYLATE BINARY SYSTEMS ONTO POLYTETRAFLUOROETHYLENE POROUS MEMBRANES

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