Poly Methyl Butyl Acrylate / Methyl Phenyl Silicone Resin Blends Preparation And Properties Of

In this dissertation, the poly (butyl methacrylate) (PBMA) Particles were synthesized by a suspension polymerization technique. We get the products which with different diameters and varying shapes by changed the speed, water-to-monomer ratio and dispersant. Structure of the polymer is characterized with Fourier transform-infrared (FT-IR) spectroscopy, Thermo-gravimetric analysis (TG), X-ray diffraction (XRD) analysis, and scanning electronic microscope(SEM). The results indicated that the best polymerization conditions should be speed 800 r·min-1, water-to-monomer ratio 6:1, poly (vinyl alcohol) (PVA) as dispersant, BPO as initiator. We obtained the PBMA with some regularity molecular, it will decomposition at 270℃-400℃.Silicone with methyl and phenyl was synthesized using Methyl chlorosilane, phenyl chlorosilane as monomer, with hyclrolysis-polycondensation in toluene. Structure of the polymer was described with Fourier transform-infrared (FT-IR) spectroscopy, Thermo-gravimetric analysis (TG), X-ray diffraction (XRD) analysis. Then we found that the terminal hydroxyl of methyl phenyl was associated. The internal structure of the polymer is like semi-crystalline, with short molecular chain. The thermo-gravimetric analysis (TG) revealed that the product have a excellent heat resistance, material decomposition temperature T10% is 539℃, when the temperature up to 700℃, the weight loss is only 25%. When heated to 1000℃, it still has 46% residual carbon.Besides, obtained the mixture of methyl-phenyl-silicone and PBMA by using solution blending. Structure of the polymer was described with scanning electronic microscope (SEM), ATR-FTIR spectroscopy, X-ray diffraction (XRD) analysis, Thermo-gravimetric analysis (TG). And study the influence caused by different silicone resin content and the Curing agent system. The results show that the higher the silicone content, the better the thermal stability of materials. After adding curing system, the compatibility between the resins was improved, the thermal stability has improved significantly. The best mixture was L3, which with 20% silicon resin and the curing agent system, whose T10%, T50%increased 30℃-40℃when compared with PBMA.Finally, in order to study the impact of polymer additives and inorganic fillers on the material properties. We prepared PBMA composite using Torque Rheometer by the Melt-blending-method. We used the torque rheology, melt flow rate, tensile testing, and thermogravimetric analysis to characterize the material properties. In addition, this article compared the methyl-phenyl silicone with the boron phenolic resin. The results show that the silicone oil has the best ability to improve the liquidity of materials, at the same time, the mica with surface modification is best for the mechanical properties. The silicone oil can also improve the thermal stability of materials. The best blends's Decomposition temperature increased 36 degrees Celsius than the PBMA, T50% is increased 104 degrees Celsius. When heated to 600 degrees Celsius, it still has 30.8% residual carbon, which is 19 times than the PBMA. It means the silicone oil and the Silicone with methyl and phenyl can greatly promoted the material into charcoal.