Cross-linked polypropylene composite material and preparation method thereof

[0026] Weigh 100 parts of homopolypropylene with a melting index of 40g / 10min, 1 part of initiator dicumyl peroxide, 1 part of crosslinking agent vinyltrimethoxysilane, 0.1 part of main antioxidant tetrakis[methyl- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and 0.1 part of secondary antioxidant tris(2,4-di-tert-butylphenyl) phosphite, 0.2 part of lubricant erucic acid After the amide is fully mixed by stirring, add a twin-screw extruder with an aspect ratio L / D of 24:1 and a screw diameter of 30mm from the main feeding port; the feeding speed is 60g / min, and the screw speed is controlled: 100 rpm per minute, the twin-screw extruder is divided into 8 heating zones, of which: the first heating zone is 180°C, the other heating zones are 200°C, and 1 part of self-crosslinking accelerator aluminum hydroxide, 1 part of catalyst dilaurel Add dibutyltin acid from the side feeding port in the middle of the screw after mixing, control the ratio of cross-linkin...

[0029] Weigh 100 parts of copolymerized polypropylene with a melting index of 0.5g / 10min, 3 parts of initiator benzoyl peroxide, 3 parts of crosslinking agent allyltrimethoxysilane, 0.5 part of main antioxidant tetrakis[methyl- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and 0.5 part of secondary antioxidant tris(2,4-di-tert-butylphenyl) phosphite, 0.5 part of lubricant After the bis stearamide is fully mixed by stirring, add a twin-screw extruder with an aspect ratio L / D of 72:1 and a screw diameter of 95mm from the main feeding port; the feeding speed is 200g / min, and the screw speed is controlled to : 500 rpm, the twin-screw extruder is divided into 8 heating zones, of which: the first heating zone is 200°C, the other heating zone is 230°C, and 5 parts of self-crosslinking accelerator aluminum hydroxide, 2 parts The catalyst dibutyltin oxide is mixed and added from the side feeding port in the middle of the screw, and the ratio of the crosslinking ...

[0032]Weigh 100 parts of homopolypropylene with a melting index of 10g / 10min, 1.5 parts of initiator methyl ethyl ketone peroxide, 1.5 parts of crosslinking agent butenyl trimethoxysilane, 0.2 parts of main antioxidant β-(3,5- Di-tert-butyl-4-hydroxyphenyl) octadecyl propionate and 0.2 part of auxiliary antioxidant pentaerythritol bisphosphite di(octearyl alcohol), 0.2 part of lubricant erucamide are fully mixed after stirring, and then A twin-screw extruder with an aspect ratio L / D of 72:1 and a screw diameter of 60mm is added to the feeding port; the feeding speed is 200g / min, the screw speed is controlled at 500 rpm, and the twin-screw extruder has a total It is divided into 8 heating zones, of which: the first heating zone is 200°C, the other heating zone is 230°C, and 2 parts of self-crosslinking accelerator short-chain polyvinyl alcohol and 1.5 parts of catalyst dibutyltin diacetate are mixed from the middle of the screw The side feeding port is added, and the ratio of t...