摘要
纳米 Ti O2 改性不饱和聚酯树脂 ,其目的是对不饱和聚酯进行同时增韧增强改性。用“反应法”制备的纳米 Ti O2 /UPR,在纳米 Ti O2 与 UPR之间产生的新化学键将纳米 Ti O2 粒子接入 UPR长链上 ,这种新的结构决定了纳米 Ti O2 /UPR的性能。研究结果表明 ,纳米 Ti O2 /UPR的反应活性高于 UPR,纳米 Ti O2 /UPR的冲击韧性和弯曲强度较 UPR分别提高 46%和 5 5 % ,纳米 Ti O2 /UPR的耐热性及介电性与
We prepared nano TiO 2/UPR with the “reaction method”, which inserts in the UPR long chain a chemical bond generated between nano TiO 2 and UPR. The new extremum at 1 261cm -1 in the IR (infrared) spectrum of nano TiO 2/UPR, shown in Fig.1, reflects the existence of this new chemical band, which determines the performance of nano TiO 2/UPR. Fig.2 gives the comparison of gel characteristic curve of UPR (curve A ) and nano TiO 2/UPR (curve B ); these curves show that the reactivity of nano TiO 2/UPR is higher than that of UPR. Subsection 2.3 discusses the strengthening and toughening effect of nano TiO 2 on nano TiO 2/UPR. Figs.4 and 5 show respectively the variations of bending strength and impact strength of nano TiO 2/UPR with amount of TiO 2; both bending and impact strength peak when amount of nano TiO 2 is 6%～7% and are 55% and 46% higher respectively than those of UPR. When amount of nano TiO 2 is 6%, the fractograph shown in Fig.4 indicates clearly that fracture is typically ductile. Subsection 2.4 discusses the thermal resistance and dielectric properties of nano TiO 2/UPR; they are both about the same as those of UPR.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2003年第4期387-390,共4页
Journal of Northwestern Polytechnical University
