What factors influence the ductility of vulcanized rubber

by:Desing      2020-04-13
Insulating rubber kraal pad - natural rubber highly malleable, but sometimes because the customer need our people to add increase the ductility of rubber products, this small make up to you, what factors influence the ductility of vulcanized rubber. ( 1) Tensile strength: not filled vulcanizates: PUR> polyurethane rubber; Natural rubber (NR/isoamyl IR> Neoprene CR> Butyl rubber IIR> Chlorosulfonated polyethylene CSM> Nitrile butadiene rubber (NBR/fluorine rubber FKM> Butadiene rubber BR> Epdm EPDM> Styrene-butadiene rubber SBR> Acrylate rubber ACM> Chlorohydrin rubber CO> Silicon Q filled vulcanizates: PUR> polyurethane rubber; Polyester thermoplastic elastomer & gt; Natural rubber (NR/isoamyl IR> SBS thermoplastic elastomer & gt; Nitrile butadiene rubber (NBR/neoprene CR> Styrene-butadiene rubber (SBR/EPDM EPDM/fluorine rubber FKM> Chlorosulfonated polyethylene CSM> Butyl rubber IIR> Butadiene rubber BR/chlorohydrin rubber CO> Acrylate rubber ACM> Q silicon under a rapid deformation, high tensile strength than slow deformation; The tensile strength of the test under high temperature, is much lower and the tensile strength at room temperature. ( 2) The effects of vulcanization system for commonly used soft vulcanizates, to improve the tensile strength by vulcanization system, sulphur - should be adopted Conventional vulcanization system of the accelerator, and appropriately increase the dosage of sulfur. While promoting agent selects the thiazole class M, DM with guanidine kind and, and appropriately increase dosage. ( 3) Filling system of the influence of filler particle size is smaller, the greater the specific surface area, surface activity, the greater is the better reinforcing effect. Crystalline ( As the basis of natural vulcanizates, the tensile strength with the increase of dosage of filler, can appear drab. An amorphous type ( Such as butyl benzene based vulcanizates, the tensile strength increases with filling agent dosage, maximum, and then decline. Low unsaturation rubber ( Like epdm, butyl vulcanizates, on the basis of the tensile strength increases with filling agent dosage, after reaching a maximum can remain the same. For type thermoplastic elastomer, filling agent make the tensile strength is reduced. In general, soft dosage of carbon black in the 40 - Sixty, the better the tensile properties of the vulcanizates. ( 4) Soften the system as a whole, the influence of the adding softener can reduce the tensile strength of the vulcanizate. But emollient quantity of not more than 5, the tensile strength of the sulfide is likely to increase. Because of containing a small amount of softener, can make the carbon black dispersion effect is good. Aromatic oil of nonpolar hydrogen unsaturated rubber ( Isoprene rubber, butadiene rubber, styrene butadiene influence the tensile strength of the vulcanizates. The amount of 5 - 15 paraffin oil on nonpolar unsaturated rubber ( Isoprene rubber, paraffin oil in nonpolar unsaturated rubber ( Isoprene rubber, butadiene rubber, styrene butadiene the tensile strength of the vulcanizates. The polarity of unsaturated rubber ( Such as nitrile butadiene rubber, neoprene, it is better to use aromatic hydrogen oil and ester softener ( If DBP, DOP, etc. ) ( 5) Improve the tensile strength of vulcanized rubber other methods: rubber and some resin blend; Such as natural rubber, styrene-butadiene rubber and the high styrene resin blend. Natural rubber and polyethylene blend. Nitrile butadiene rubber and PVC blend, ethylene propylene and polypropylene blend. There are many factors that can influence of fluorine rubber, the main is to master the knowledge of ratio, so the Thai rubber insulation kraal mat prompt you, pay attention to the allocation and optimization of product performance. Related: what factors influence the ductility of vulcanized rubber
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