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Vulcanizing agent and applications thereof

A vulcanizing agent, vulcanization and cross-linking technology, applied in organic chemistry, silicon organic compounds, chemical instruments and methods, etc., can solve problems such as reversible design of cross-linking methods

Active Publication Date: 2020-04-21
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in general, the current technology is still focused on the desulfurization stage, and the reversible design of the crosslinking method has not yet been carried out from the source of vulcanization crosslinking.

Method used

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  • Vulcanizing agent and applications thereof
  • Vulcanizing agent and applications thereof
  • Vulcanizing agent and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Preparation of novel vulcanizing agent:

[0041] 1. A vulcanizing agent having a structure shown in formula (I)

[0042] The structural formula of vulcanizing agent A is:

[0043]

[0044] The synthesis method is shown in Reaction Scheme 1.

[0045] Synthesis of reactant ①: Add furfuryl alcohol (6.43 g, 0.07 mol) into 20 ml of sodium hydroxide (40 wt%) aqueous solution, and stir for 1 h. Afterwards, 10ml of toluene, 5g of 4-chloromethylstyrene and 4.25g of tetrabutylammonium hydroxide aqueous solution (40wt%) were added as catalysts to the above mixed solution, and reacted at room temperature for 48h. After the reaction was completed, excess water was added to the reaction solution, and extracted with ether. The organic phase was dried with anhydrous magnesium sulfate, filtered, and finally the organic solvent was removed by rotary evaporation to obtain the reactant ① with a yield of 76%.

[0046] The reactant ②N,N'-(4,4'-methylenediphenyl)bismaleimide is a comme...

Embodiment 2

[0087] In parts by mass, 100 parts of polypropylene (melt index MFR=2.0g / 10min, 230°C, the same below), 0.1 part of 1010 (antioxidant), 0.1 part of 168 (antioxidant), 0.1 part of 2,5 -Dimethyl-2,5-two (tert-butyl peroxy) hexane (initiator), 2 parts of vulcanizing agent A of the present invention are mixed, then the mixture is added to a 35-type twin-screw extruder (double Longkeya Nanjing Machinery Co., Ltd.) for melting. The temperature of the melting section of the extruder is 160°C, the temperature of the reaction section is 190°C, the temperature of the melt delivery section is 200°C, the temperature of the outlet is 180°C, the screw speed is set at 150rpm, and the extruded product is cooled by a circulating water bath and Cut into pellets to obtain the final product.

Embodiment 3

[0089] In parts by mass, 100 parts of polypropylene, 0.1 part of 1010 (antioxidant), 0.1 part of 168 (antioxidant), 0.2 part of 2,5-dimethyl-2,5-di(tert-butyl peroxy Base) hexane (initiator), 5 parts of vulcanizing agent A of the present invention are mixed, then the mixture is added to a 35-type twin-screw extruder for melting. The temperature of the melting section of the extruder is 160°C, the temperature of the reaction section is 190°C, the temperature of the melt delivery section is 200°C, the temperature of the outlet is 180°C, the screw speed is set at 150rpm, and the extruded product is cooled by a circulating water bath and Cut into pellets to obtain the final product.

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Abstract

The invention discloses a class of novel vulcanizing agents and applications in polymers. According to the invention, the vulcanizing agent is added during polymer processing, and can form a cross-linked network in a polymer to improve the mechanical properties of the material; the cross-linking agent can decross-link the polymer material at a high temperature, and can cross-link again to generatea network structure after being cooled, so that the polymer material is endowed with repeated processing thermoplasticity; and the vulcanizing agent provided by the invention can solve the contradiction between cross-linking reinforcement and recycling of high polymer materials.

Description

technical field [0001] The invention relates to the technical field of polymer vulcanizing agents, in particular to a class of vulcanizing agents and applications thereof, in particular to a class of vulcanizing agents with reversible crosslinking functions and their application in polymers. Background technique [0002] Vulcanization is an important means of cross-linking polymers. The three-dimensional network structure formed after vulcanization can endow polymer materials with higher strength, temperature stability and chemical stress cracking resistance, especially for rubber materials. Polymer materials, only through cross-linking modification, can they have the elasticity, resilience, strength and dimensional stability required in the application process. [0003] Sulfur vulcanization is the first rubber cross-linking process discovered by humans. The vulcanization process greatly improves the physical and chemical properties of rubber products. After nearly two hund...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K5/3417C08K5/1535C08K5/54C08K5/544C08L23/12C08L23/16C08L23/22C08K13/02C07D491/18C07D519/00C07F7/08
CPCC08K5/3417C08K5/1535C08K5/5403C08K5/544C08K13/02C07D519/00C07D491/18C07F7/0805C07F7/0827C07F7/0814C07F7/083C08L23/06C08L23/12C08L2205/03C08L2312/08C08L2312/00C08L23/16C08L23/22Y02W30/62B29C48/001B29C48/022B29K2105/24B29K2021/00C08K5/14C08K5/1345C08K5/526B29C2948/92704B29C48/40B29K2023/12C08F110/06C08K5/151
Inventor 牛慧谢诗琪刘姝慧何宗科包卓刘丽英华哲王爱慧尹文静王晶李旭孙爽
Owner DALIAN UNIV OF TECH
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