Study on polydimethylsiloxane/organic montmorillonite nanocomposites
【摘要】：正 A series of novel exfoliated polydimethylsiloxane (PDMS)/Organic montmorillonite (O-MMT) nanocomposites with different structures and properties were synthesized by using PDMS and different organoclays. The results indicate that there are very good compatibilities between O-MMT and PDMS. Nanoscale silicate dispersion was analyzed by FT-IR, XRD, SEM, and transmission electron microscopy (TEM). Mechanical properties and dynamic mechanical analysis (DMA) were measured to assess reinforcement. Solvent uptake analyses were used to evaluate PDMS /silicate interactions and the extent of cure. TGA was also used to measure the thermal stability. It was shown that the MMT-TPAC in PDMS matrix can increase not only the toughness but also the strength and modulus of PDMS to a great extent.