Effect of hydrogen containing silicone oil on the mechanical properties and molding liquid silicone rubber-Iota

Products

News

Office Address:	Sunmoon Science Park, 985 Xingzhong Road, High-Tech Zone, Bengbu, China
Factory Address:	Mohekou Industrial Park, Huaishang District, Bengbu, Anhui, China
Contact:	Nathan Zhang
Phone:	0086-552-19805521900
FAX:	0086-552-3822922
Mobile:	19805521900/18119733779
WebSite:	www.siliconeoil.cn www.siliconeoil.net
Email:
QQ:	729118868

News > Dynamic industry > Effect of hydrogen containing silicone oil on the mechanical properties and molding liquid silicone rubber

Effect of hydrogen containing silicone oil on the mechanical properties and molding liquid silicone rubber

Additional liquid silicone polymer, is the basis for hydrogen containing silicone oil as crosslinking agent, catalyst in the presence of platinum at room temperature or heatingvulcanization cross-linking agent into a silicone elastomers by vinyl poly two methylsiloxane. Compared to the condensed liquid silicone molding liquid silicone, and cross-linking in vulcanization process has no by-products, minimal shrinkage, deep sulfide, on the contact material has the advantages of no corrosion. In recent years, additional liquidsilicone into all kinds of silica gel in the fastest growing varieties.

In recent years, to improve the mechanical properties of addition liquid silicone and its application and development has been widespread concern. A large number of reportson the effect of silica on addition type liquid silicone performance has been. Mechanical properties of addition liquid silicone hydrogen containing silicone oil also has great effect;and the current research in this area is relatively less.

The same viscosity, active hydrogen mass fraction of different multi hydrogen containing silicone oil as crosslinking agent to prepare liquid rubber, vulcanized and madespecimen, determination of the mechanical properties. When the active hydrogen in hydrogen containing silicone oil mass fraction increased from 0.43% to 1.57%, the tensile strength increased from 4.7MPa to 6.1MPa liquid glue, shore A hardness graduallyincreased, while the elongation at break from 490% to 255%. This is due to the samehydrogen containing silicone oil viscosity, along with the increase of hydrogenconcentration, cross-linking between the actual molecular chains became shorter, liquidadhesive strength and hardness, the elongation at break decreases; when the mass fraction of active hydrogen hydrogen containing silicone oil increased from 0.75% to1.57%, the tear strength did not change significantly. This may be explained as follows:when the mass fraction of active hydrogen hydrogen containing silicone oil rose to 0.75%, the relative concentration of cross-linking agent Si-H bond in the molecular chain,the resulting steric effect make effective crosslinking point liquid glue was not significantly increased, so that the tear strength of glue.

Adding different viscosity of methyl silicone rubber in liquid hydrogen terminated in the basic formula, and discusses its influence on the mechanical properties of the liquidrubber. With the increase of hydrogen terminated silicone oil viscosity liquid glue,elongation at break, tear strength gradually increased, while the tensile strength andshore A hardness decreased. This can be interpreted as, with the increase of hydrogen terminated silicone oil viscosity, the chain growth, the molecular weight of vinyl silicone oilwith vinyl end silicone oil after the increase in reaction, and hydrogen containing siliconecross-linking, increase the molecular chain of the elongation at break increased, the tensile strength and hardness decreased.