Modification of dicyanate ester resin by liquid carboxyl-terminated butadiene acrylonitrile copolymer
作者：Yun Huang ? , Xiaoyan Ma , Xu Wang a, Xianru He ,LiLiu
關鍵字：Composite materials ,Elastomers, Fracture ,Thermal properties
論文來源：期刊
具體來源：Materials Chemistry and Physics, 2010,121(1-2), pp241-248
發(fā)表時間：2010年
Bisphenol A dicyanate ester (BADCy) was
modified with liquid carboxyl-terminated butadiene acrylonitrile (LCTBN). The
cured BADCy resin was formed through the cyclotrimerization of cyanate
functional groups into triazine rings, and there was the chemical reaction
between BADCy and LCTBN. Mechanical performance indicated that the introduction
of LCTBN into BADCy resin improved the impact strength with maintenance in
flexural strength. Scanning electron microscopy (SEM) showed that the pure
resin had a smooth glassy fracture surface, whereas cured blends containing
LCTBN showed rougher fracture surfaces, and exhibited enhanced impact
resistance. The TEM observation showed that the two phases in the cured resins
exhibit a good interaction adhesion. Thermograms of BADCy modified with LCTBN showed
the little reduction of heat deflection temperature, and a reduction in thermal
stability temperature by 30 K. Dynamic mechanical analysis (DMA) showed that
the pure BADCy had higher storage modulus (E’) values than that of the BADCy
modified with LCTBN, whereas the loss modulus (E’’) was lower, and that the
glass transition temperature (Tg) of modified BADCy was 229?C and lower than
that(249?C) of pure BADCy resin.