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Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   2000 , Volume 9 , Number 1; Page(s) 11 To 18.
 
Paper: 

DRAWING TEMPERATURE AND MECHANICAL PROPERTIES OF HIGH-DENSITYPOLYETHYLENE DRAWN TAPES

 
 
Author(s):  RANA S.K.*
 
* Centre for Polymer Science and Engineering, Indian Institute of Technology Delhi, New Delhi 110016, India
 
Abstract: 
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The effect of drawing temperature on the mechanical properties of high‑ density polyethylene (HDPE) tape is explored through scanning electron microscope and differential scanning calorimeter using etching as a tool for investigation. The HDPE tape was made by a hot melt extruder fitted with a bottom fed die and was drawn in (i.e., oriented), on‑line on a hot plate maintained at constant temperature. It is shown that the drawing temperature of 82° C produces a tape with better mechanical properties with a draw ratio of 8.4 than the tapes drawn at 62, 72 and 92°C to the same draw ratio. Thin and notch free fibrils and those containing long chain crystallites are attributed for this superior behaviour in mechanical properties. Taut heat setting shows that out of varied range of crystallites produced during drawing, short folded chain and long folded chain crystallites are stable and the long folded chain crystallites are responsible for making tapes mechanically stronger. 

 
Keyword(s): DRAWING, MORPHOLOGY, TAPE, CRYSTALLIZATION, MELTING
 
References: 
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