The Effect of Melt Temperature and Extrusion Rate on the Die Swell of Metallocene and Conventional Polyethylene

Bronagh Millar; Gerard McNally; W Murphy; Paul McLaughlin

The Effect of Melt Temperature and Extrusion Rate on the Die Swell of Metallocene and Conventional Polyethylene

Bronagh Millar^*, Gerard McNally, W Murphy, Paul McLaughlin

^*Corresponding author for this work

School of Mechanical and Aerospace Engineering

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

Abstract

A range of metallocene and conventional PE resins of various comonomer types, were extruded from a single capillary rheometer, at different melt temperatures and extrusion rates. Analysis shows that die swell increases with increasing extrusion rate and decreasing melt temperature. GPC analysis elucidated the influence of molecular characteristics on die swell. Increased die swell was found for the broader MWD (3.5-3.8) conventional PEs, in comparison with the narrower mPEs (2.1-3.1), and in the higher molecular weight resins. Furthermore, long chain branching was found to increase die swell

Original language	English
Pages	44-48
Number of pages	5
Publication status	Published - May 2003
Event	61st Annual Technical Conference for Plastic Professionals - Nashville, TN, United States Duration: 04 May 2003 → 08 May 2003 https://www.proceedings.com/content/000/000009webtoc.pdf

Conference

Conference	61st Annual Technical Conference for Plastic Professionals
Abbreviated title	ANTEC 2003
Country/Territory	United States
City	Nashville, TN
Period	04/05/2003 → 08/05/2003
Internet address	https://www.proceedings.com/content/000/000009webtoc.pdf

Keywords

metallocene polyethylene
die swell

Cite this

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title = "The Effect of Melt Temperature and Extrusion Rate on the Die Swell of Metallocene and Conventional Polyethylene",

abstract = "A range of metallocene and conventional PE resins of various comonomer types, were extruded from a single capillary rheometer, at different melt temperatures and extrusion rates. Analysis shows that die swell increases with increasing extrusion rate and decreasing melt temperature. GPC analysis elucidated the influence of molecular characteristics on die swell. Increased die swell was found for the broader MWD (3.5-3.8) conventional PEs, in comparison with the narrower mPEs (2.1-3.1), and in the higher molecular weight resins. Furthermore, long chain branching was found to increase die swell",

keywords = "metallocene polyethylene, die swell",

author = "Bronagh Millar and Gerard McNally and W Murphy and Paul McLaughlin",

year = "2003",

month = may,

language = "English",

pages = "44--48",

note = "61st Annual Technical Conference for Plastic Professionals, ANTEC 2003 ; Conference date: 04-05-2003 Through 08-05-2003",

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TY - CONF

T1 - The Effect of Melt Temperature and Extrusion Rate on the Die Swell of Metallocene and Conventional Polyethylene

AU - Millar, Bronagh

AU - McNally, Gerard

AU - Murphy, W

AU - McLaughlin, Paul

PY - 2003/5

Y1 - 2003/5

N2 - A range of metallocene and conventional PE resins of various comonomer types, were extruded from a single capillary rheometer, at different melt temperatures and extrusion rates. Analysis shows that die swell increases with increasing extrusion rate and decreasing melt temperature. GPC analysis elucidated the influence of molecular characteristics on die swell. Increased die swell was found for the broader MWD (3.5-3.8) conventional PEs, in comparison with the narrower mPEs (2.1-3.1), and in the higher molecular weight resins. Furthermore, long chain branching was found to increase die swell

AB - A range of metallocene and conventional PE resins of various comonomer types, were extruded from a single capillary rheometer, at different melt temperatures and extrusion rates. Analysis shows that die swell increases with increasing extrusion rate and decreasing melt temperature. GPC analysis elucidated the influence of molecular characteristics on die swell. Increased die swell was found for the broader MWD (3.5-3.8) conventional PEs, in comparison with the narrower mPEs (2.1-3.1), and in the higher molecular weight resins. Furthermore, long chain branching was found to increase die swell

KW - metallocene polyethylene

KW - die swell

M3 - Paper

SP - 44

EP - 48

T2 - 61st Annual Technical Conference for Plastic Professionals

Y2 - 4 May 2003 through 8 May 2003

ER -

The Effect of Melt Temperature and Extrusion Rate on the Die Swell of Metallocene and Conventional Polyethylene

Abstract

Conference

Keywords

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