不同交联剂对聚硅氧烷裂解产物的影响

Influence of cross-linking reagent on the pyrolysate of polysiloxane as precursor to Si-O-C ceramics

分别利用含乙烯基聚硅氧烷(VPSO)和二乙烯基苯(DVB)作为交联剂使含氢聚硅氧烷(HPSO)固化,然后在高温下裂解。采用X射线衍射、红外光谱、元素分析等手段对VPSO/HPSO和DVB/HPSO两个体系的裂解产物进行表征。结果表明,两个体系的裂解产物在结构和成分上有明显不同。比较了两者间的差别,认为裂解产物存在差异的原因是不同交联剂引发交联方式不同,从而导致交联产物结构不同。

Hydrogen-containing Polysiloxane (HPSO) was cured with vinyl-containing Polysiloxane (VPSO) and divinylbenzene (DVB) as cross-linking reagent, respectively. The pyrolysates of DVB/HPSO and VPSO/HPSO were characterized by XRD, FTIR, and element analysis (EA). The results showed that the structure and component of pyrolysate of DVB/HPSO were different from those of pyrolysate of VPSO/HPSO. The difference resulted from the different structures of cured DVB/HPSO and VPSO/HPSO.