fulltext.study @t Gmail

In situ copolymerization of ethylene to linear low-density polyethylene (LLDPE) with calcosilicate (CAS-1) supported dual-functional catalytic system

Paper ID Volume ID Publish Year Pages File Format Full-Text
52497 46875 2007 7 PDF Available
Title
In situ copolymerization of ethylene to linear low-density polyethylene (LLDPE) with calcosilicate (CAS-1) supported dual-functional catalytic system
Abstract

Calcosilicate (CAS-1) was used for the first time as an effective carrier for simultaneous immobilization of a dual-functional catalytic system consisted of iron-based bis(imino) pyridyl complex (O) and zirconocene compound (C) to form heterogeneous catalyst precursor (CAS-1/O/C). The α-olefins formed form O-catalyzed ethylene oligomerization copolymerized in situ with ethylene to linear low-density polyethylene (LLDPE) under the catalysis of C in CAS-1/O/C upon addition of cocatalysts as described hereafter. Instead of methylaluminoxane (MAO), triethylaluminum (TEA) was employed to activate the copolymerization reaction with high catalytic activities and smooth kinetic process. Experimental results reflected that the selectivity for lower α-olefins was improved due to the confinement effect of the layered structures of CAS-1, hence greatly increasing the incorporation rate of α-olefins into LLDPE main chains and the branching degree accordingly during the in situ copolymerization of α-olefins and ethylene. The layered structure of CAS-1 endowed the resultant LLDPE with improved thermal stability in addition to higher molecular weights (Mn).

Keywords
In situ copolymerization; Ethylene; CAS-1; Support; Dual-functional catalyst
First Page Preview
In situ copolymerization of ethylene to linear low-density polyethylene (LLDPE) with calcosilicate (CAS-1) supported dual-functional catalytic system
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 12, December 2007, Pages 2143–2149
Authors
, , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us