苯丙/二氧化硅改性剂对胶合板胶合性能和燃烧性能的影响

Combustion properties and bonding strength of plywood with a styreneacrylic-SiO_2 type adhesive

为提高胶合板胶合强度,降低其燃烧性能,以苯丙/二氧化硅(SiO_2)作为改性剂,通过物理共混的方法制备了改性脲醛树脂(UF)胶。研究了苯丙/二氧化硅改性剂粒径、添加量对胶合板胶合强度和燃烧性能影响。改性剂粒径设置为60,800,10 000目等3个水平,选出最适粒径后,设置添加量(质量分数)为0,5%,10%,15%,20%,25%等6个水平。结果表明:改性剂粒径和添加量对胶合板胶合强度和燃烧性能影响显著,当粒径为60目,改性剂添加量为15%时,制备的胶合板性能最佳,胶合强度为1.33 MPa,热释放总量为16.3 MJ·m^(-2),释烟总量为149.80 m^2·m^(-2)。

To determine how different particle sizes and additions of styrene-acrylic-SiO2 influenced the bonding strength and combustion properties of plywood, a novel urea-formaldehyde （UF） resin adhesive was modified through physical blending with styrene-acrylic-SiO2, and flame retardant and bond strength test were carried out. Results showed that a particle size of 60 mesh and a 15% addition of styrene-acrylic-SiO2 had a strong ell fect on bonding strength and combustion properties of plywood. With these conditions, plywood had the best performance when bonding strength was 1.33 MPa, total heat release was 16.3 MJ＇m-z, and total smoke release was 149.80 m2·m-2.