Premium
Pressure‐volume‐temperature properties and thermophysical analyses of AO‐60/NBR composites
Author(s) -
Song Meng,
Qin Qi,
Zhu Jing,
Yu Guomin,
Wu Sizhu,
Jiao Mingli
Publication year - 2019
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.25042
Subject(s) - materials science , volume (thermodynamics) , natural rubber , composite material , isothermal process , thermal expansion , compressibility , equation of state , thermodynamics , composite number , physics
AO‐60/nitrile‐butadiene rubber (AO‐60/NBR) composites with different AO‐60 contents were prepared and characterized by pressure‐volume‐temperature (PVT) dilatometry in the pressure and temperature ranges of 0–80 MPa and 25–80°C, respectively. The PVT data were analyzed in terms of the empirical Tait equation of state. The thermal expansion coefficient ( α ) and isothermal compressibility ( β ) were calculated from the best fit of the Tait equation to the PVT data. The results showed that α and β increased with AO‐60 content, and these results were related to the activity of the molecular chains and the free volume of the composite. The relations were demonstrated by the positron annihilation spectroscopy (PALS) studies. The present study hopes to provide theoretical guidance to the quantitative study of the PVT relationships and thermophysical properties of rubber materials. POLYM. ENG. SCI., 59:949–955, 2019. © 2018 Society of Plastics Engineers