Premium
Effects of CH 2 CH 2 CF 3 on properties of RTV polysiloxane rubber: Processability, thermal stability, and oil/solvent resistance
Author(s) -
Li Bo,
Chen Shuangjun,
Zhang Jun
Publication year - 2014
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.39708
Subject(s) - materials science , vulcanization , thermal stability , ultimate tensile strength , natural rubber , composite material , solvent , polydimethylsiloxane , chemical resistance , fourier transform infrared spectroscopy , elastomer , elongation , rheology , chemical engineering , chemistry , organic chemistry , engineering
Room temperature vulcanizing fluorosilicone rubbers (FSRs) were prepared from polydimethylsiloxane (PDMS), vinyl fluorosilicone‐oil (VFS‐oil), and precipitated silica (PDMS/VFS/SiO 2 ). Rheological tests showed appropriate processing condition could be obtained when shear rate > 10 s −1 . Mechanical tests indicated that tensile strength and elongation at break were not much affected by VFS‐oil and no decline was observed after being aged in 70 °C ASTM 1# oil. The CF 3 group could not only increase oil‐resistance, but also decrease surface energy, which were proved by ATR‐FTIR and contact angle tests. The PDMS oil immersion tests showed that the higher the content of VFS‐oil, the better oil resistance can be obtained. The solvent‐resistance tests indicated that the VFS‐oil improved resistance to nonpolar/low‐polar solvent. TGA results showed that the increasing content of VFS‐oil could slightly decrease FSRs' thermal stability but increase FSRs' residual mass ratio at 790°C. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 39708.