HDPE树脂的无机刚性粒子增韧

Rigid inorganic filler toughening of HDPE resin

采用重质 Ca CO3 、高岭土、硅灰石及绢英粉等无机刚性粒子对 HDPE树脂进行增韧 ,考察了无机刚性粒子的表面处理方法、偶联剂种类、无机刚性粒子种类以及基体树脂的韧性等对增韧效果的影响。结果表明 :Ca CO3 和绢英粉对 HDPE树脂有较好的增韧效果 ,增韧试样的缺口冲击强度可分别达到基体树脂的 12倍和 9倍以上 ,而高岭土和硅灰石则无明显的增韧作用 ;无机刚性粒子的增韧行为主要为偶联剂的种类所左右 ;在使用同种偶联剂时 ,无机刚性粒子的混入方法、基体树脂的韧性等因素均不会改变其对HDPE的增韧效果和倾向 ;发现基体树脂的相对分子质量较低时 。

Some rigid inorganic fillers such as heavy CaCO 3, kaolin, silica, biotite, etc. are used to toughen HDPE resin. The toughening effects were investigated with respect to the filler surface treatment method, types of coupling agents, types of fillers and toughness of the matrix resin. The results indicate that CaCO 3 and biotite have good toughening effects on HDPE resin with the IZ notched impact strength of toughened samples 12 times and 9 times higher than the matrix resin; whereas kaolin and silica had no clear toughening effects. The toughening property of the rigid inorganic fillers was mainly due to the types of coupling agents. For the same coupling agents, the filler blending method, and the matrix resin toughness do not change the toughening effects on the HDPE resin. The results show that for low relative molecular mass matrix resins, the increase of the IZ notched impact strength of the composite system is higher.