Production method for maleic anhydride grafted ethylene propylene regenerated rubber powder

Abstract

The invention discloses a production method for a maleic anhydride grafted ethylene propylene regenerated rubber powder. The method comprises the following steps: uniformly mixing maleic anhydride, auxiliaries and waste ethylene propylene rubber powder in a high-speed mixer; entering into a multifunctional rubber and plastic processing device; breaking chain and regenerating the waste ethylene propylene rubber powder under the action of microwave, and meanwhile, triggering grafting reaction of maleic anhydride and ethylene propylene rubber, thereby acquiring the grafted ethylene propylene regenerated rubber powder. According to the production method disclosed by the invention, the auto-agglutination of grafted monomers, polymer decomposition and volatile organic gas generation under high temperature can be avoided, the production method is beneficial to environmental protection and the material performance is improved.

Description

technical field [0001] The invention relates to a production method of maleic anhydride grafted ethylene-propylene reclaimed rubber powder, and belongs to the technical field of graft modification of polymer materials. Background technique [0002] Non-polar polymers are poorly compatible with other materials, such as polar polymers, inorganic fillers, etc., making it impossible to prepare useful blends. The addition of pre-made or in-situ compatibilizers enables otherwise incompatible polymers to form blends with unique properties not found in either component. [0003] So far, maleic anhydride grafted polymers are the most important functionalized materials due to their cheapness, high activity, and good processability, improving the interfacial cohesion between the dispersed and continuous phases in blends, and it is important in polymerization There are a wide range of applications in polymer blends, polymer / inorganic fillers, polymer / organic fibers, composite reinforce...

AI Technical Summary

Problems solved by technology

[0007] There are several serious problems in the melt grafting method that need to be solved urgently: 1) Unsaturated carboxylic acid or acid anhydride is easy to volatilize at high temperature, and the volatilized gas is irritating and harmful to human body, which not only affects the environment, but also reduces the cost of raw materials. 2) When the reaction temperature is high, the free radical initiator will not only trigger the grafting reaction, but also trigger the crosslinking of ethylene-propylene rubber. The increase in the amount of the free radical initiator will increase the gel content of the graft, making The processing performance becomes worse; 3) Although increasing the amount of free radical initiator can increase the grafting rate, in order to control the gel content, the amount of free radical initiator is usually controlled at a low level, and the prepared functionalized ethylene propylene rubber Very low grafting rate