聚碳硅烷与二乙烯基苯的交联反应及其发光性能研究

Reaction mechanisms and photoluminescence (PL) properties of polycarbosilane/divinylbenzene (PCS/DVB) with different cross-linking reaction time were investigated. Their microstructure were characterized by Fourier transform infrared (FTIR) and Nuclear magnetic resonance (NMR). PL properties was carried out at room temperature by Fluorescence spectrophotometer. Thermal stability was performed on a thermal gravimetric analysis (TG). The results show that PCS/DVB samples with σ-π conjugated structure consist of -Si-C-Si-, -Si-H, -Si-CH3 and -Si-CH2-CH2-phenyl. The higher PL intensity of PCS/DVB samples is attributed to the stronger electrons delocalization level of the extended σ-π conjugation. Moreover, the fluorescence emission intensity of PCS/DVB increases with the rise of hydrosilylation crosslinking reaction time.