Synergistic effect of temperature and stress during stress relaxation of LLDPE/EVA coextruded films

Arthur L. Bobovitch; Ami Sagron; Yakov Unigovski; Albert Jarashneli; Emmanuel M. Gutman

Synergistic effect of temperature and stress during stress relaxation of LLDPE/EVA coextruded films

Arthur L. Bobovitch, Ami Sagron, Yakov Unigovski, Albert Jarashneli, Emmanuel M. Gutman

Department of Materials Engineering

Research output: Contribution to conference › Paper › peer-review

Abstract

The morphology and stress relaxation of coextruded five layer LLDPE (linear low density polyethylene)/EVA (ethylene-vynil-acetate) copolymer films were studied. It was found that the increasing of VA (vinyl acetate) content in EVA causes the decreasing of shrink tension of the films which can be explained by a decrease in crystallinity amount. It was shown that the relaxation time spectrum of the coextruded crosslinked LLDPE/EVA films is similar to the relaxation time spectrum of crosslinked LLDPE film at room temperature. However, at the elevated temperatures the additional peak appears on the spectrum of coextruded film. The cause of this peak is temperature-stress induced recrystallization of EVA during the relaxation test (this recrystallization was observed with DSC and wide angle X-ray analysis).

Original language	English
Pages	2839-2843
Number of pages	5
State	Published - 3 Jun 2004
Event	ANTEC 2004 - Annual Technical Conference Proceedings - Chicago, IL., United States Duration: 16 May 2004 → 20 May 2004

Conference

Conference	ANTEC 2004 - Annual Technical Conference Proceedings
Country/Territory	United States
City	Chicago, IL.
Period	16/05/04 → 20/05/04

Keywords

EVA
Oriented film
Stress-relaxation

ASJC Scopus subject areas

General Chemical Engineering
Polymers and Plastics

Cite this

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title = "Synergistic effect of temperature and stress during stress relaxation of LLDPE/EVA coextruded films",

abstract = "The morphology and stress relaxation of coextruded five layer LLDPE (linear low density polyethylene)/EVA (ethylene-vynil-acetate) copolymer films were studied. It was found that the increasing of VA (vinyl acetate) content in EVA causes the decreasing of shrink tension of the films which can be explained by a decrease in crystallinity amount. It was shown that the relaxation time spectrum of the coextruded crosslinked LLDPE/EVA films is similar to the relaxation time spectrum of crosslinked LLDPE film at room temperature. However, at the elevated temperatures the additional peak appears on the spectrum of coextruded film. The cause of this peak is temperature-stress induced recrystallization of EVA during the relaxation test (this recrystallization was observed with DSC and wide angle X-ray analysis).",

keywords = "EVA, Oriented film, Stress-relaxation",

author = "Bobovitch, {Arthur L.} and Ami Sagron and Yakov Unigovski and Albert Jarashneli and Gutman, {Emmanuel M.}",

year = "2004",

month = jun,

day = "3",

language = "English",

pages = "2839--2843",

note = "ANTEC 2004 - Annual Technical Conference Proceedings ; Conference date: 16-05-2004 Through 20-05-2004",

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TY - CONF

T1 - Synergistic effect of temperature and stress during stress relaxation of LLDPE/EVA coextruded films

AU - Bobovitch, Arthur L.

AU - Sagron, Ami

AU - Unigovski, Yakov

AU - Jarashneli, Albert

AU - Gutman, Emmanuel M.

PY - 2004/6/3

Y1 - 2004/6/3

N2 - The morphology and stress relaxation of coextruded five layer LLDPE (linear low density polyethylene)/EVA (ethylene-vynil-acetate) copolymer films were studied. It was found that the increasing of VA (vinyl acetate) content in EVA causes the decreasing of shrink tension of the films which can be explained by a decrease in crystallinity amount. It was shown that the relaxation time spectrum of the coextruded crosslinked LLDPE/EVA films is similar to the relaxation time spectrum of crosslinked LLDPE film at room temperature. However, at the elevated temperatures the additional peak appears on the spectrum of coextruded film. The cause of this peak is temperature-stress induced recrystallization of EVA during the relaxation test (this recrystallization was observed with DSC and wide angle X-ray analysis).

AB - The morphology and stress relaxation of coextruded five layer LLDPE (linear low density polyethylene)/EVA (ethylene-vynil-acetate) copolymer films were studied. It was found that the increasing of VA (vinyl acetate) content in EVA causes the decreasing of shrink tension of the films which can be explained by a decrease in crystallinity amount. It was shown that the relaxation time spectrum of the coextruded crosslinked LLDPE/EVA films is similar to the relaxation time spectrum of crosslinked LLDPE film at room temperature. However, at the elevated temperatures the additional peak appears on the spectrum of coextruded film. The cause of this peak is temperature-stress induced recrystallization of EVA during the relaxation test (this recrystallization was observed with DSC and wide angle X-ray analysis).

KW - EVA

KW - Oriented film

KW - Stress-relaxation

UR - http://www.scopus.com/inward/record.url?scp=2442704474&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:2442704474

SP - 2839

EP - 2843

T2 - ANTEC 2004 - Annual Technical Conference Proceedings

Y2 - 16 May 2004 through 20 May 2004

ER -

Synergistic effect of temperature and stress during stress relaxation of LLDPE/EVA coextruded films

Abstract

Conference

Keywords

ASJC Scopus subject areas

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