Long chain branching on linear polypropylene by solid state reactions

E. Borsig; A. D. Gotsis; F. Picchioni

doi:10.1016/j.eurpolymj.2007.10.008

Long chain branching on linear polypropylene by solid state reactions

E. Borsig, A. D. Gotsis^*, F. Picchioni

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

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Abstract

A method was developed for the long chain branching (LCB) of isotactic polypropylene (iPP) via modification in the solid state. PP long chains have been linked as branches to the original linear iPP chains using solid state reactions in the presence of a free radical initiator and a multifunctional monomer (co-agent). The modified samples of branched iPP were characterised by gel permeation chromatography (GPC) and rheological measurements. Several methods were applied in order to estimate indirectly the extent of branching. A ranking was made of the co-agents according to their ability in inducing LCB as opposed to cross-linking and degradation of iPP. The furfuryl sulphide (FS) showed the highest efficiency for the branching reaction, while the divinylbenzene (DVB) is not suitable for branching. (c) 2007 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	200-212
Number of pages	13
Journal	European Polymer Journal
Volume	44
Issue number	1
DOIs	https://doi.org/10.1016/j.eurpolymj.2007.10.008
Publication status	Published - Jan-2008

Keywords

isotactic polypropylene
long chain branching
peroxide modification
co-agents
melt strength
thermoforming
ISOTACTIC POLYPROPYLENE
CROSS-LINKING
METALLOCENE CATALYST
PEROXIDE
POLYETHYLENES
RHEOLOGY
SHEAR
FUNCTIONALIZATION
COPOLYMERIZATION
EFFICIENCY

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@article{4a0ecbbf0f4348189254a11df6815554,

title = "Long chain branching on linear polypropylene by solid state reactions",

abstract = "A method was developed for the long chain branching (LCB) of isotactic polypropylene (iPP) via modification in the solid state. PP long chains have been linked as branches to the original linear iPP chains using solid state reactions in the presence of a free radical initiator and a multifunctional monomer (co-agent). The modified samples of branched iPP were characterised by gel permeation chromatography (GPC) and rheological measurements. Several methods were applied in order to estimate indirectly the extent of branching. A ranking was made of the co-agents according to their ability in inducing LCB as opposed to cross-linking and degradation of iPP. The furfuryl sulphide (FS) showed the highest efficiency for the branching reaction, while the divinylbenzene (DVB) is not suitable for branching. (c) 2007 Elsevier Ltd. All rights reserved.",

keywords = "isotactic polypropylene, long chain branching, peroxide modification, co-agents, melt strength, thermoforming, ISOTACTIC POLYPROPYLENE, CROSS-LINKING, METALLOCENE CATALYST, PEROXIDE, POLYETHYLENES, RHEOLOGY, SHEAR, FUNCTIONALIZATION, COPOLYMERIZATION, EFFICIENCY",

author = "E. Borsig and Gotsis, {A. D.} and F. Picchioni",

year = "2008",

month = jan,

doi = "10.1016/j.eurpolymj.2007.10.008",

language = "English",

volume = "44",

pages = "200--212",

journal = "European Polymer Journal",

issn = "0014-3057",

publisher = "PERGAMON-ELSEVIER SCIENCE LTD",

number = "1",

}

TY - JOUR

T1 - Long chain branching on linear polypropylene by solid state reactions

AU - Borsig, E.

AU - Gotsis, A. D.

AU - Picchioni, F.

PY - 2008/1

Y1 - 2008/1

N2 - A method was developed for the long chain branching (LCB) of isotactic polypropylene (iPP) via modification in the solid state. PP long chains have been linked as branches to the original linear iPP chains using solid state reactions in the presence of a free radical initiator and a multifunctional monomer (co-agent). The modified samples of branched iPP were characterised by gel permeation chromatography (GPC) and rheological measurements. Several methods were applied in order to estimate indirectly the extent of branching. A ranking was made of the co-agents according to their ability in inducing LCB as opposed to cross-linking and degradation of iPP. The furfuryl sulphide (FS) showed the highest efficiency for the branching reaction, while the divinylbenzene (DVB) is not suitable for branching. (c) 2007 Elsevier Ltd. All rights reserved.

AB - A method was developed for the long chain branching (LCB) of isotactic polypropylene (iPP) via modification in the solid state. PP long chains have been linked as branches to the original linear iPP chains using solid state reactions in the presence of a free radical initiator and a multifunctional monomer (co-agent). The modified samples of branched iPP were characterised by gel permeation chromatography (GPC) and rheological measurements. Several methods were applied in order to estimate indirectly the extent of branching. A ranking was made of the co-agents according to their ability in inducing LCB as opposed to cross-linking and degradation of iPP. The furfuryl sulphide (FS) showed the highest efficiency for the branching reaction, while the divinylbenzene (DVB) is not suitable for branching. (c) 2007 Elsevier Ltd. All rights reserved.

KW - isotactic polypropylene

KW - long chain branching

KW - peroxide modification

KW - co-agents

KW - melt strength

KW - thermoforming

KW - ISOTACTIC POLYPROPYLENE

KW - CROSS-LINKING

KW - METALLOCENE CATALYST

KW - PEROXIDE

KW - POLYETHYLENES

KW - RHEOLOGY

KW - SHEAR

KW - FUNCTIONALIZATION

KW - COPOLYMERIZATION

KW - EFFICIENCY

U2 - 10.1016/j.eurpolymj.2007.10.008

DO - 10.1016/j.eurpolymj.2007.10.008

M3 - Article

SN - 0014-3057

VL - 44

SP - 200

EP - 212

JO - European Polymer Journal

JF - European Polymer Journal

IS - 1

ER -

Long chain branching on linear polypropylene by solid state reactions

Abstract

Keywords

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