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: 四子王旗| 岐山县| 天柱县| 获嘉县| 万盛区| 咸丰县| 铁岭市| 寿宁县| 定日县| 夏河县| 文水县| 武宁县| 星子县| 通辽市| 宁武县| 宁河县| 平泉县| 绥中县| 延安市| 忻城县| 烟台市| 哈尔滨市| 西安市| 琼海市| 兰西县| 玉田县| 察雅县| 蒙山县| 龙南县| 西藏| 施秉县| 乐清市| 刚察县| 潍坊市| 宾川县| 临清市| 栾城县| 夏津县| 安龙县| 宣武区| 金坛市|