Abstract
Calorimetrically determined integral heats of solution and swelling ratio measurements carried out on extrudates of low-density polyethylene blended with Surlyn ionomer and ethylene–ethyl acrylate copolymer provide independent evidence for the redistribution of components as a result of extrusion. Although this evidence for “migration” supports earlier data for extrusion-triggered molecular redistribution in polyethylene, the present data further suggest that the effect may be due at least in part to the tendency of crystallizable polydisperse polymers to form cohesively weak boundary layers upon cooling from the melt. Thus, molecular redistribution effects may be expected in the processing of polyethylene and related thermoplastics but would not be pronounced in the extrusion of amorphous, narrow molecular weight distribution polymers, e.g., polystyrene.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
