Abstract
The drawing of mats of linear PE single crystals prepared from the dilute solution is possible at temperatures higher than about 90°C. The structure and properties of the drawn specimen are remarkably different from those of the ordinary bulk drawn specimen1).
In this paper the drawn mat was investigated by a calorimetric method, Differential Scanning Calorimeter. The experimentalresults characteristically obtained for the drawn mat specimen are summarized as follows:
1) Broad melting curve
2) Remarkable super-heating depending on the rate of heating
3) Constancy of the melting point and the heat of fusion with annealing
4) Remarkable discrepancy from the heat of fusion-density relationship obtained on the ordinary bulk drawn specimen. This is due to the higher density of the amorphous region of the drawn mat compared with that of the bulk drawn specimen.
These results imply that the structure of the mat drawn specimen is characterized by the larger number of the tie chains connecting the neighbouring crystals, and agrees with the structure postulated in the previous paper1).
