私密直播全婐app免费大渔直播,国产av成人无码免费视频,男女同房做爰全过程高潮,国产精品自产拍在线观看

當前位置:群英聚首 > 論文著作 > 正文
Synthesis of branched polypropylene with isotactic backbone and atactic side chains by binary iron and zirconium single site catalysts
來源:葉志斌教授個人網站 發布日期:2019-08-24
作者:Z. Ye, S. Zhu*
關鍵字:Binary catalyst system, Single-site-type catalysts, Tandem action, Propylene polymerization, Branched, High-impact poly(propylene) (PP)
論文來源:期刊
具體來源:Journal of Polymer Science, Part A, Polymer Chemistry
發表時間:2003年
This article reports the use of a binary single‐site catalyst system for synthesizing comb‐branched polypropylene samples having isotactic polypropylene (iPP) backbones and atactic polypropylene (aPP) side chains from propylene feedstock. This catalyst system consisted of the bisiminepyridine iron catalyst {[2-ArN?C(Me)]2C5H3N}FeCl2 [Ar=2,6-C6H3(Me)2] (1) and the zirconocene catalyst rac-Me2Si(2-MeBenz[e]Ind)2ZrCl2 (2). The former in situ generated 1-propenyl‐ended aPP macromonomer, whereas the latter incorporated the macromonomer into the copolymer. The effects of reaction conditions, such as the catalyst addition procedure and the ratio of 1/2 on the branching frequency, were examined. Copolymer samples having a branching density up to 8.6 aPP side chains per 1000 iPP monomer units were obtained. The branched copolymers were characterized by 13C NMR and differential scanning calorimetry.
Copyright © 2005 Polymer.cn All rights reserved
中國聚合物網 版權所有
經營性網站備案信息

京公網安備11010502032929號

工商備案公示信息

京ICP證050801號

京ICP備12003651號

主站蜘蛛池模板: 郁南县| 禹城市| 偏关县| 青冈县| 博客| 独山县| 通江县| 阜平县| 剑河县| 综艺| 宝山区| 绥棱县| 巴林右旗| 新巴尔虎左旗| 永清县| 吴江市| 信丰县| 融水| 济宁市| 曲松县| 务川| 成安县| 巴彦淖尔市| 沂源县| 南丰县| 建阳市| 抚远县| 双辽市| 乾安县| 金昌市| 尉犁县| 景洪市| 甘洛县| 醴陵市| 武宁县| 育儿| 蒙阴县| 孟连| 衡山县| 崇礼县| 德令哈市|