Effect of molecular weight on polymer processability

Journal Article · Sat Jan 01 00:00:00 EST 1983 · Rubber World; (United States)

OSTI ID:5537195

Karg, R F

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.

• Research Organization: Copolymer Rubber and Chemical Corp., Baton Rouge, LA
• OSTI ID: 5537195
• Journal Information: Rubber World; (United States), Vol. 187:4
• Country of Publication: United States
• Language: English

Related Subjects

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)