Tertiary Amine Modified Liquid Nitrile Rubber Toughened Epoxy Adhesive
A technology of liquid nitrile rubber and epoxy adhesive, which is applied in the direction of adhesives, adhesive types, epoxy resin glue, etc., and can solve the problem of reducing the crosslinking density of epoxy resin curing, affecting the high-temperature performance of the adhesive, Epoxy adhesives are brittle and other problems, to achieve the effect of increasing the curing crosslinking density, ensuring the toughening effect, good mechanical properties and toughness
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Embodiment 1
[0009] The composition of the epoxy adhesive toughened by tertiary amine modified liquid nitrile rubber: 100g bisphenol A epoxy resin, 50g polyamide 651 curing agent, 40g tertiary amine modified liquid nitrile rubber, mix well and then cure, room temperature Cured for 7 days. Main properties of epoxy adhesive: tensile strength 31.3MPa, elongation at break 16.9%, impact strength 62.1kJ / m 2 , high temperature glass transition temperature 93.7 ℃.
[0010] Blank comparison: the untoughened epoxy adhesive prepared by 100g bisphenol A epoxy resin and 50g polyamide 651 has a tensile strength of 53.7MPa, an elongation at break of 3.3%, and an impact strength of 12.2kJ / m 2 , high temperature glass transition temperature 87.7 ℃.
Embodiment 2
[0012] Preparation of tertiary amine modified liquid nitrile rubber toughened epoxy adhesive: 100g bisphenol F epoxy resin, 47.4g polyamide 651 curing agent, 60g tertiary amine modified liquid nitrile rubber, after mixing evenly, React at 23°C for 5 days. Main properties of epoxy adhesive: tensile strength 20.7MPa, elongation at break 19.2%, impact strength 84.3kJ / m 2 , high temperature glass transition temperature 96.3 ℃.
[0013] Blank comparison: the untoughened adhesive prepared by 100g bisphenol F epoxy resin and 47.4g polyamide 651 has a tensile strength of 54.7MPa, an elongation at break of 3.0%, and an impact strength of 11.5kJ / m 2 , high temperature glass transition temperature 86.2 ℃.
Embodiment 3
[0015] Preparation of the epoxy adhesive toughened by tertiary amine modified liquid nitrile rubber: 100g bisphenol A type epoxy resin, 10g triethylenetetramine, 25g tertiary amine modified liquid nitrile rubber, after mixing evenly, cure, 50 Cure for 1 day. Main properties of epoxy adhesive: tensile strength 33.8MPa, elongation at break 5.6%, impact strength 26.7kJ / m 2 , high temperature glass transition temperature 112.1 ℃.
[0016] Blank comparison: 100g bisphenol A epoxy resin and 10g triethylenetetramine prepared untoughened adhesive, the tensile strength is 65.3MPa, the elongation at break is 2.1%, and the impact strength is 7.3kJ / m 2 , high temperature glass transition temperature 90.6 ℃.
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