Study On The Heat-Resistance Formula And Properties Of ESBR

In this paper,the environmental-protection emulsion polystyrene butadiene rubber (ESBR) was studied.The effect of the curing system,the anti-aging system and the plasticizing system on the heat-resistance of ESBR was studied,and on this basis,using thermo-gravimetric analyzer (TGA), dynamic thermal mechanical analyzer (DMA) and X-ray diffraction(XRD),the effect of the content of carbon black,silica and their blend, as well as the variety and dosage of layered silicate on the ESBR was further discussed, it aimed at providing reference base about the formula for improving ESBR products'heat aging, at the same time providing support theory for enlarging the application field of products.The research content is as follows:First, the effect of the curing system,the anti-aging system and the plasticizing system on ESBR was studied.When TMTD/DPTT's ratio is 1/1,the anti-ager RD/MB's ratio is 1.5/2, and the coumarone dosage is 10 phr,the tensile strength vary rate and elongation at break vary rate can reach 12.9% and 19.2% respectively,the comprehensive performance can achieve the best.The second,the effect of carbon black, silica and their blend on ESBR was studied. The dosage of carbon black or silica was 40 phr,or carbon black/silica's ratio of 30/10,the excellent heat-resistence property was gained where the tensile strength vary rate and elongation at break vary rate of rubber can reach 5.58% and 17.2% respectively for filling their blend of 30/10; with the dosage of carbon black or silica increasing from 30 to 60phr,the content of carbon black in improving the thermal stability of rubber was better;and increasing the content of fillers,the network structure was more perfect,the Payne effect was enhanced.The third,the effect of the variety and dosage of layered silicate on ESBR was studied. The intercalating OMMT/ESBR nanocomposite was prepared by mechanical blending method, when adding 2 phr OMMT, the thermal stability achieved the most excellent;and for the ESBR filled with ultrafine silicate fillers, when the F100 and KTC's content was respectively 10 and 20 phr, the comprehensive property was best, contrasting the two fillers, F100 was better in improving the thermal degradation temperature of rubber, what's more, increasing the dosage of F100 and KTC, ESBR's G'growed, and Payne effect increased.