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Chain Shuttling Catalysis and Olefin Block Copolymers (OBCs)

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Part of the book series: Topics in Organometallic Chemistry

Abstract

Olefin block copolymers (OBCs) with new-to-the-world properties have recently been made via a process called chain shuttling polymerization. These systems comprise two or more catalysts with differing affinities for comonomer combined with a chain shuttling agent (CSA), which distributes the growing polymer chains among the various catalysts. The result is a unique block copolymer, with statistically distributed block sizes and numbers of blocks per chain. A unique property of the materials is that the melting temperature is nearly independent of the comonomer incorporation, which breaks a seemingly immutable relationship that was long held to be true.

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Abbreviations

CSA:

Chain shuttling agent

OBC:

Olefin block copolymer

LDPE:

Low density polyethylene

LLDPE:

Linear low density polyethylene

VLDPE:

Very low density polyethylene

ULDPE:

Ultra-low density polyethylene

HDPE:

High density polyethylene

PE:

Polyethylene

PP:

Polypropylene

iPP:

Isotactic polypropylene

aPP:

Atactic polypropylene

sPP:

Syndiotactic polypropylene

LAO:

Linear alpha olefin

f-PVC:

Flexible polyvinylchloride

TPU:

Thermoplastic polyurethane

TPV:

Thermoplastic vulcanizate

CCG:

Catalyzed chain growth

CTA:

Chain Transfer Agent

CCTP:

Coordinative chain transfer polymerization

TiBA:

Triisobutylaluminum

TMA:

Trimethylaluminum

TEA:

Triethylaluminum

MAO:

Methylalumoxane

MMAO:

Modified methylalumoxane

DEZ:

Diethylzinc

oct:

Octyl

poly:

Polymeryl

HS:

Hard segment

SS:

Soft segment

GPC:

Gel-permeation chromatography

Mn:

Number-average molecular weight

Mw:

Weight-average molecular weight

Mw/Mn:

Molecular weight distribution

DSC:

Differential scanning calorimetry

CRYSTAF:

Crystallization analysis fractionation

TREF:

Temperature rising elution fractionation

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Acknowledgments

We thank David Devore, David Graf, Pamela Stirn, Marilyn Bokota, Daryoosh Beigzadeh, Robert Froese, Chris Schultz, Mike Allen, Curt Theriault, Gordon Roof, Tom Karjala, Min Zhang, Lindsey Miller, Jan Bazen, Colin Li Pi Shan, Wilson Cheung, James Stevens, Ben Poon, and Gary Marchand for their hard work and many helpful discussions .

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Authors and Affiliations

  1. The Dow Chemical Company, Bld 1776, Midland, MI, 48674, USA

    Timothy T. Wenzel & Daniel J. Arriola

  2. The Dow Chemical Company, 2301 Brazosport, Freeport, TX, 77541, USA

    Edmund M. Carnahan, Phillip D. Hustad & Roger L. Kuhlman

Authors
  1. Timothy T. Wenzel
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  2. Daniel J. Arriola
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  3. Edmund M. Carnahan
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  4. Phillip D. Hustad
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  5. Roger L. Kuhlman
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Corresponding authors

Correspondence to Timothy T. Wenzel or Edmund M. Carnahan .

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© 2008 Springer-Verlag London

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Wenzel, T., Arriola, D., Carnahan, E., Hustad, P., Kuhlman, R. (2008). Chain Shuttling Catalysis and Olefin Block Copolymers (OBCs). In: Topics in Organometallic Chemistry. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3418_2008_11

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  • DOI: https://doi.org/10.1007/3418_2008_11

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