TY - JOUR
T1 - Free volume change of elongated polyethylene films studied using a positron probe microanalyzer
AU - Oka, Toshitaka
AU - Oshima, Nagayasu
AU - Suzuki, Ryoichi
AU - Uedono, Akira
AU - Fujinami, Masanori
AU - Kobayashi, Yoshinori
N1 - Funding Information:
The authors thank the Japan Science and Technology Agency for the financial supports of this study. A part of this work was conducted at the AIST nanocharacterizing facility, supported by “Nanotechnology Network Japan” of the Ministry of Education, Culture, Sports, Science and Technology, Japan.
PY - 2012/11/12
Y1 - 2012/11/12
N2 - Free volume change of low density polyethylene (LDPE) and high density polyethylene (HDPE) films upon mechanical deformation was microscopically investigated by positron probe microanalysis (PPMA). The ortho-positronium (o-Ps) lifetimes were gradually shortened by uniaxial deformation, indicative of shrinkage of the free volume. The o-Ps intensity for HDPE increased by deformation, whereas that for LDPE varied little. It suggests that destruction of crystallites plays an important role in the deformation of HDPE. PPMA is demonstrated to be a promising, powerful probe investigating free volume changes, at different local points subjected to different degrees of deformation, in elongated polymers.
AB - Free volume change of low density polyethylene (LDPE) and high density polyethylene (HDPE) films upon mechanical deformation was microscopically investigated by positron probe microanalysis (PPMA). The ortho-positronium (o-Ps) lifetimes were gradually shortened by uniaxial deformation, indicative of shrinkage of the free volume. The o-Ps intensity for HDPE increased by deformation, whereas that for LDPE varied little. It suggests that destruction of crystallites plays an important role in the deformation of HDPE. PPMA is demonstrated to be a promising, powerful probe investigating free volume changes, at different local points subjected to different degrees of deformation, in elongated polymers.
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U2 - 10.1063/1.4766457
DO - 10.1063/1.4766457
M3 - Article
AN - SCOPUS:84870015289
VL - 101
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 20
M1 - 203108
ER -