Automobile guide ball pins formed by nano-scale alumina particles modified pet polyester
A nano-scale, guide ball technology, which is applied to the material of automobile guide ball pins and the field of automobile guide ball pins, can solve the problems of difficulty in improving the notched impact strength and poor adhesion of the dual-phase interface, and achieve excellent notched impact strength and fracture Excellent elongation, easy to promote the effect
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Embodiment 1
[0051] 10g of nanoscale alumina powder (average particle size = 320nm) and 5g of silane coupling agent KH570 were ultrasonically dispersed in toluene, stirred and reacted at 120°C for 4h in a nitrogen atmosphere, and then cooled to room temperature. Add 8 g of glycidyl methacrylate dissolved in toluene and a few drops of AIBN, and stir the reaction at 80° C. for 2 h in a nitrogen atmosphere. After centrifugal drying, use acetone extraction to remove unreacted coupling agent and residual toluene solvent, and finally dry to obtain modified nano-scale alumina particles. The grafting rate of glycidyl methacrylate obtained from TGA data is 13.8wt %.
[0052] Preheat 8g of modified nano-sized alumina particles at 90°C, add them to 40g of PET polyester preheated and melted at 90°C, the number-average molecular weight of PET polyester is Mn=38500 Daltons, and stir in vacuum for 2.5h, so that both Mix evenly to obtain modified PET polyester.
[0053] 65g polycarbonate (number average...
Embodiment 2
[0055] 10g of nanoscale alumina powder (average particle size = 320nm) and 6g of silane coupling agent KH570 were ultrasonically dispersed in toluene, stirred and reacted at 130°C for 6h in a nitrogen atmosphere, and then cooled to room temperature. Add 12 g of glycidyl methacrylate dissolved in toluene and a few drops of AIBN, and stir the reaction at 80° C. for 2 h in a nitrogen atmosphere. After centrifugal drying, extract with acetone to remove unreacted coupling agent and residual toluene solvent, and finally dry to obtain modified nano-scale alumina particles. The grafting rate of glycidyl methacrylate obtained from TGA data is 15.4wt %.
[0056] Preheat 10g of modified nano-sized alumina particles at 90°C, add them to 40g of PET polyester that is preheated and melted at 90°C, the number average molecular weight of PET polyester is Mn=38500 Daltons, and stir in vacuum for 3 hours to make the two evenly Mixed to obtain modified PET polyester.
[0057] 70g polycarbonate ...
Embodiment 3
[0059] Ultrasonic dispersion of 10g of nano-sized alumina powder (average particle size = 320nm) and 4g of silane coupling agent KH570 in toluene, stirred and reacted at 125°C for 3h in a nitrogen atmosphere, and then cooled to room temperature. Add 6 g of glycidyl methacrylate dissolved in toluene and a few drops of AIBN, and stir the reaction at 80° C. for 2 h in a nitrogen atmosphere. After centrifugal drying, extract with acetone to remove unreacted coupling agent and residual toluene solvent, and finally dry to obtain modified nano-scale alumina particles. The grafting ratio of glycidyl methacrylate obtained from TGA data is 11.3wt %.
[0060] Preheat 7g of modified nano-sized alumina particles at 90°C, add them to 42g of PET polyester preheated and melted at 90°C, the number-average molecular weight of PET polyester is Mn=38500 Daltons, and stir in vacuum for 4 hours to make the two evenly Mixed to obtain modified PET polyester.
[0061] 60g polycarbonate (number avera...
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