Oriented polyethylene of a very high molecular mass – preparation of film and its preliminary structural studies
Oriented polyethylene of a very high molecular mass – preparation of film
and its preliminary structural studies
The procedure of formation by the gel method of films from polyethylene of very high molecular mass (Mw = 3.7 x 104) dissolved in decalin has been presented. It has been shown that coherent gels are obtained from solutions of a concentration ≥ 0,5% by weight. Films have been oriented by drawing and the effect of the drawing ralic (l = 6, 14, and 26) on polymer structure, as determined by X-ray diffraction, light microscopy and differential calorimetry, has been determined. Drawn polyethylene films reveal typical fibrillar structure. At higher l-values a distinct narrowing of the distribution of normal orientations to the (110) and (200) crystallographic planes is observed. The results of investigations for samples of lower l-values (6 and 14) reveal the presence of crystallites with two different distributions of orientation.
If you are interested in full versions of articles, please contact the editorial team of email@example.com