Open AccessEffect of Relaxation Heat Setting at Various Temperatures on Molecular Orientation in Polypropylene Fiber
Author(s) -
Wei Ai,
Xin Liu,
You Song,
Fangyi Liu,
Ze Yu,
Lei Tao,
Hongtao Liu
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/562/1/012057
Subject(s) - relaxation (psychology) , polypropylene , materials science , orientation (vector space) , modulus , degree (music) , fiber , composite material , acoustics , geometry , physics , medicine , mathematics
Commercially available polypropylene fiber (PPF) samples with relaxation heat setting for 30 minutes in a drying oven at various temperatures (room temperature, 90 °C, 100 °C, 110 °C, 120 °C, 130 °C, 140 °C, 150 °C, respectively.) were prepared for measurement of their sonic velocity, orientation degree, orientation angle and modulus. According to the obtained data for the PPF molecular orientation before and after the relaxation heat setting, it is found that, with the increasing of relaxation heat setting temperature, the sonic velocity in PPF, orientation degree and modulus decreased, while the orientation angle increased. The result may be helpful to choose proper working temperature for PP hernia patch fabrication.