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: 安阳县| 含山县| 绥德县| 松潘县| 义乌市| 贵州省| 敖汉旗| 谷城县| 修文县| 韶山市| 自治县| 宕昌县| 金坛市| 西丰县| 铅山县| 无为县| 枣强县| 黔南| 阳曲县| 高平市| 鹤岗市| 大丰市| 泰来县| 武清区| 巴楚县| 洪洞县| 鹤岗市| 宁河县| 长丰县| 湘潭县| 常德市| 安泽县| 天等县| 平度市| 临汾市| 红安县| 延吉市| 澜沧| 巩义市| 双桥区| 清河县|