Effect of novel amido ester internal donor on the performance of Ziegler Natta catalyst for propylene polymerization

IF 1.3 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Main Group Chemistry Pub Date : 2022-03-20 DOI:10.3233/mgc-210126

Bharat R. Paghadar, J. B. Sainani, K.M. Samith, S. Tantry, Poornima Bhagavath

{"title":"Effect of novel amido ester internal donor on the performance of Ziegler Natta catalyst for propylene polymerization","authors":"Bharat R. Paghadar, J. B. Sainani, K.M. Samith, S. Tantry, Poornima Bhagavath","doi":"10.3233/mgc-210126","DOIUrl":null,"url":null,"abstract":"Various classes of molecules like diethers, succinates, diesters, amido esters are currently being used as internal donors on MgCl2 supported titanium catalysts for isotactic polypropylene as an alternative to phthalate donors owing to their potential health risk laid down by REACH legislation. In the present paper, design and synthesis of a few novel amido ester internal donors with single chiral center (7–11) by mimicking the model amido ester 3 having two chiral centers; and their catalyst preparation method were described. Further preliminary polymerization tests with newly synthesized donor molecules were investigated and results revealed that by structurally mimicking 3 with one chiral center and also with varied substitutional patterns in ester/amido moiety decline the polypropylene activity as well as isotacticity. These donor molecules are ineffective for appropriate coordination on MgCl2 sites on inducing steric hindrance for improved isotacticity; nevertheless also induces poisoning effect for the active Ti centers leading to catalyst fouling in many cases.","PeriodicalId":18027,"journal":{"name":"Main Group Chemistry","volume":"9 1","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2022-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Main Group Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.3233/mgc-210126","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Various classes of molecules like diethers, succinates, diesters, amido esters are currently being used as internal donors on MgCl2 supported titanium catalysts for isotactic polypropylene as an alternative to phthalate donors owing to their potential health risk laid down by REACH legislation. In the present paper, design and synthesis of a few novel amido ester internal donors with single chiral center (7–11) by mimicking the model amido ester 3 having two chiral centers; and their catalyst preparation method were described. Further preliminary polymerization tests with newly synthesized donor molecules were investigated and results revealed that by structurally mimicking 3 with one chiral center and also with varied substitutional patterns in ester/amido moiety decline the polypropylene activity as well as isotacticity. These donor molecules are ineffective for appropriate coordination on MgCl2 sites on inducing steric hindrance for improved isotacticity; nevertheless also induces poisoning effect for the active Ti centers leading to catalyst fouling in many cases.

查看原文本刊更多论文

新型酰胺酯内给体对丙烯聚合Ziegler - Natta催化剂性能的影响

由于REACH法规规定了邻苯二甲酸盐给体的潜在健康风险，目前正将二醚、琥珀酸盐、二酯、酰胺酯等不同类别的分子用作MgCl2支持的等规聚丙烯钛催化剂的内给体，以替代邻苯二甲酸盐给体。本文通过模拟具有两个手性中心的酰胺酯3模型，设计合成了几种具有单手性中心(7-11)的新型酰胺酯内给体;介绍了它们的催化剂制备方法。对新合成的给体分子进行了进一步的初步聚合实验，结果表明，通过单手性中心和不同的酯/氨基取代模式在结构上模拟3，聚丙烯的活性和等规性都有所下降。这些供体分子不能在MgCl2位点上进行适当的配位，也不能诱导空间位阻来改善等规性;然而，在许多情况下也会引起活性钛中心的中毒效应，导致催化剂污染。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Main Group Chemistry 化学-化学综合

CiteScore

2.00

自引率

26.70%

发文量

审稿时长

>12 weeks

期刊介绍： Main Group Chemistry is intended to be a primary resource for all chemistry, engineering, biological, and materials researchers in both academia and in industry with an interest in the elements from the groups 1, 2, 12–18, lanthanides and actinides. The journal is committed to maintaining a high standard for its publications. This will be ensured by a rigorous peer-review process with most articles being reviewed by at least one editorial board member. Additionally, all manuscripts will be proofread and corrected by a dedicated copy editor located at the University of Kentucky.