The influence of thermomechanical relaxations on the impact behaviour of rotationally moulded polyethylene is presented in this paper. Four grades of polyethylene: two linear low density and two medium density, are considered. Impact tests carried out over a temperature range -50 °C to +30 °C indicate a maximum value of impact strength at -10 °C for three of the materials tested, and at -30 °C for the fourth material. Dynamic mechanical thermal analysis of each material shows a slight increase in viscous modulus at a temperature corresponding to that at which maximum impact strength occurs.
|Number of pages||4|
|Journal||Journal of Engineering and Applied Science|
|Publication status||Published (in print/issue) - 1 Dec 1996|
|Event||Proceedings of the 1996 54th Annual Technical Conference. Part 2 (of 3) - Indianapolis, IN, USA|
Duration: 5 May 1996 → 10 May 1996