Premium
Surface properties and thermal stability of a novel low‐surface‐energy polybenzoxazine/clay nanocomposites
Author(s) -
Dong Huijie,
Xin Zhong,
Lu Xin,
Qu Li
Publication year - 2012
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.22257
Subject(s) - materials science , nanocomposite , thermal stability , curing (chemistry) , surface energy , thermogravimetry , composite material , contact angle , thermogravimetric analysis , fourier transform infrared spectroscopy , chemical engineering , engineering
A novel type of polybenzoxazine (PB‐m)/clay nanocomposites were prepared from 2‐bis (3‐methyl‐3,4‐dihydro‐2H‐1,3‐benzoxazinyl) propane (B‐m) and di‐methyl, di‐octadecyl ammonium chloride (DODMAC)‐modified clay. Surface properties and thermal stability of the PB‐m/clay nanocomposites were characterized by contact angle measurement and thermogravimetry (TGA), respectively. It was found that the PB‐m/clay nanocomposites possess the lowest surface free energy (15.27 mJ/m 2 ) after 8 h curing at 210°C, which is even lower than that of poly (tetrafluoroethylene) (21.0 mJ/m 2 ), and the presence of the clay in the B‐m PB‐m matrix enhances the stability of the surface energy at 210°C. FTIR results show that the intercalated structures of PB‐m/clay nanocomposites have no influence on the hydrogen‐bonding network of the PB‐m during curing. Combining with the results of atomic force microscope, it can be concluded that the stability of surface energies of the PB‐m/clay nanocomposites is mainly affected by the migration and masking of clay. Also, TGA results show that the addition of clay improves the thermal stability of PB‐m. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers