Abstract
AbstractThe effects of drawing temperature and the presence of various types of additives on gamma and ultraviolet radiation induced oxidative degradation of high density polyethylene have been studied. Uniaxial drawing of the polymer was conducted at 60, 80, and 100°C. The additives were an antioxidant, light stabilizer, and carbon black, used in various combinations, Oxidative degradation was followed from carbonyl formation by IR spectroscopy. It is found that at a given draw ratio, the oxidative degradation is retarded when the drawing temperature is increased, irrespective of whether or not the polymer contains any additives in any combination. This is due to the decrease of the surface and/or bulk microcracks formed during the drawing process at high temperature. Carbon black/antioxidant mixtures were shown to be antagonistic, while a carbon black/light stabilizer mixture resulted in a synergetic effect in drawn or undrawn materials.
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.
