Single block grafting modification method for silicon dioxide and use of Si-CL-PTMG to improvement of crystallization property of polyester
A single-silica and silica technology, which is applied in the field of surface graft modification to improve crystalline properties and performance materials, can solve the problems of complex, time-consuming, and harsh experimental conditions of diblock experimental methods, and achieves improved crystallinity, Good effect, less restrictive effect
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Embodiment 1
[0026] Such as figure 1 The present invention discloses a method for improving the performance of polyester materials by using modified silica, the method steps are as follows:
[0027] Graft modification on the surface of silica: Disperse 3.0g of nano-silica into 25mL of benzene solution, add 25mL of thionyl chloride under nitrogen protection, react at 65 degrees Celsius for 4 hours, centrifuge, and After centrifugation, the product was dried in a vacuum oven at 60°C for 20 hours. Then, the treated silicon dioxide is reacted with polytetramethylene glycol (PTMG) with a relative molecular mass of 500-1500 by a solution method, and the polytetramethylene glycol is grafted on the surface of the silicon dioxide to obtain a product Si-CL-PTMG.
[0028] Preparation of modified silica and polyester composite material: the mass ratio of Si-CL-PTMG and polyester is 3%, and the micro-blender is used for melt blending, so that Si-CL-PTMG is uniformly dispersed in polyester, and finally...
Embodiment 2
[0038] Graft modification on the surface of silica: disperse 3.0g of nano-silica into 20mL of benzene solution, add 20mL of thionyl chloride under nitrogen protection, react at 65 degrees Celsius for 5 hours, centrifuge, and After centrifugation, the product was dried in a vacuum oven at 60°C for 24 hours. Then, the treated silica was reacted with polytetramethylene glycol through a solution method, and polytetramethylene glycol was grafted onto the surface of silica to obtain Si-CL-PTMG.
[0039] The preparation of the modified silica and polyester composite material: Si-CL-PTMG and polyester are mixed according to the mass ratio of 1%, and the micro-blender is used to melt blend, so that Si-CL-PTMG is uniformly dispersed in the polyester, Finally, the obtained material is placed in a vacuum oven at 60 degrees Celsius for 24 hours to obtain the final composite material.
[0040] Wherein, the method for preparing the composite material by the solution method is as follows:
...
Embodiment 3
[0043] Graft modification on the surface of silica: disperse 3.0g of nano silica into 25mL of benzene solution, add 25mL of thionyl chloride under nitrogen protection, react at 65 degrees Celsius for 4 hours, centrifuge, and After centrifugation, the product was dried in a vacuum oven at 60°C for 24 hours. Then, the treated silicon dioxide is reacted with polytetramethylene glycol by a solution method, and the reaction process is magnetically stirred, and the rotating speed of the magnetic stirring magnet is 400r / min, and polytetramethylene glycol is grafted to the surface of silicon dioxide to obtain the product Si-CL-PTMG.
[0044] The preparation of the modified silica and polyester composite material: the mass ratio of Si-CL-PTMG and polyester is 5%, and the micro-blender is used for melt blending, so that Si-CL-PTMG is uniformly dispersed in the polyester, Finally, the obtained material is placed in a vacuum oven at 60 degrees Celsius for 24 hours to obtain the final com...
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