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Title: Effect of molecular weight on polymer processability

Abstract

Differences in rheological behavior due to the polymer molecular weight and molecular weight distribution have been shown with the MPT. SBR polymers having high molecular weight fractions develop higher stress relaxation time values due to the higher degree of polymer entanglements. Tests conducted at increasing temperatures show the diminishing influence of the polymer entanglements upon stress relaxation time. EPDM polymers show stress relaxation time and head pressure behavior which correlates with mill processability. As anticipated, compounded stock of EPDM have broad molecular weight distribution has higher stress relaxation time values than EPDM compounds with narrow molecular weight distribution.

Authors:
Publication Date:
Research Org.:
Copolymer Rubber and Chemical Corp., Baton Rouge, LA
OSTI Identifier:
5537195
Alternate Identifier(s):
OSTI ID: 5537195
Resource Type:
Journal Article
Resource Relation:
Journal Name: Rubber World; (United States); Journal Volume: 187:4
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ORGANIC POLYMERS; PROCESSING; HEAT TREATMENTS; MOLECULAR WEIGHT; PRESSURE DEPENDENCE; RHEOLOGY; STRESS RELAXATION; ORGANIC COMPOUNDS; POLYMERS; RELAXATION 360401* -- Polymers & Plastics-- Preparation & Fabrication-- (-1987); 400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)

Citation Formats

Karg, R.F. Effect of molecular weight on polymer processability. United States: N. p., 1983. Web.
Karg, R.F. Effect of molecular weight on polymer processability. United States.
Karg, R.F. Sat . "Effect of molecular weight on polymer processability". United States.
@article{osti_5537195,
title = {Effect of molecular weight on polymer processability},
author = {Karg, R.F.},
abstractNote = {Differences in rheological behavior due to the polymer molecular weight and molecular weight distribution have been shown with the MPT. SBR polymers having high molecular weight fractions develop higher stress relaxation time values due to the higher degree of polymer entanglements. Tests conducted at increasing temperatures show the diminishing influence of the polymer entanglements upon stress relaxation time. EPDM polymers show stress relaxation time and head pressure behavior which correlates with mill processability. As anticipated, compounded stock of EPDM have broad molecular weight distribution has higher stress relaxation time values than EPDM compounds with narrow molecular weight distribution.},
doi = {},
journal = {Rubber World; (United States)},
number = ,
volume = 187:4,
place = {United States},
year = {Sat Jan 01 00:00:00 EST 1983},
month = {Sat Jan 01 00:00:00 EST 1983}
}