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Studies on the Free-Volume Change in Annealed Ultra-High Molecular Weight Polyethylene by the Positron Annihilation Technique

✍ Scribed by Shen, Shiyu ;Lou, Jihong ;Cheng, Jixin ;Hong, Kunlun ;Zhu, Qingren ;Zhou, Xianyi


Book ID
105384514
Publisher
John Wiley and Sons
Year
1995
Tongue
English
Weight
289 KB
Volume
147
Category
Article
ISSN
0031-8965

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Ah&met-The method of positron annihilation was used to study changes of free volume in polycarbonate. Annealing at 180Β°C and pressure 808 MPa causes significant changes of free volume (-23%) compared to nonannealed polycarbonate. The free volume compressibility was estimated to be -3.10-' MPa-'. The