Environmental-friendly polypropylene compatilizer preparation method

Abstract

The invention relates to a high-efficiency environmental-friendly polypropylene compatilizer and a preparation method thereof. 60-95 polypropylene, 0.1-10 initiating agent, 1-20 maleic anhydride, 0.5-15 comonomer and 0.1-7 antidegradant are put in a high-pressure reaction vessel by weight percent (the sum of weight percent of all the raw materials is equal to 100 percent.), the solid phase grafting reaction is performed to the mixture for 0.2-2 hours under the stirring action to obtain polypropylene initiation masterbatch, then 2-30 percent by weight of polypropylene initiation masterbatch and 70-98 percent by weight of pure polypropylene are mixed in a high-speed mixer at the room temperature, then the melting graft reaction is performed to the mixture on a double-screw extruder, and then the extrusion granulation is carried out to obtain the maleic anhydride grafted polypropylene compatilizer. Compared with the prior art, the method is simple and also suitable for the industrial production, and no solvent is required to be used, therefore, no harmful toxic matter emission exists, and meanwhile, the high-efficiency environmental-friendly polypropylene compatilizer has low residual quantity of acid anhydride and odor and is beneficial to environmental protection.

Description

technical field [0001] The invention relates to the field of polymer science, in particular to an efficient and environment-friendly polypropylene compatibilizer and a preparation method thereof. Background technique [0002] Polypropylene is widely used, but because polyolefin is a non-polar material, the compatibility of polypropylene with most high polymers, inorganic fillers and metals is not good, which affects the properties of composite materials, such as mechanical properties, heat resistance Performance, surface finish, coatability, etc., thus limiting its wide application. Maleic anhydride grafted polypropylene can improve the non-polarity of its surface. Polar maleic anhydride is grafted to the main chain of polypropylene to endow the material with special properties, which can improve the blending and filling materials. Therefore, its application as a compatibilizer and binder has attracted more and more attention. [0003] At present, the use of maleic anhydri...

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Problems solved by technology

[0004] However, at present, the preparation of maleic anhydride grafted polypropylene compatibilizers mostly adopts melt grafting, solution grafting, solid phase grafting and irradiation grafting, etc., wherein, melt grafting generally uses a twin-screw extruder to directly react Grafting (Zhou Chunhuai, Yang Junzhong, China Plastics, 13(1), 1999, 31-38; Wang Lishu; Wang Yilong; Chen Zhenyu, Modern Plastics Processing and Application, 19(2), 2007, 15-18; Wang Yazhen, CN02118793.2, etc.) , this kind of method has very big defects such as the residual amount of maleic anhydride is too high, the degradation of polypropylene is serious, and the grafting rate is difficult to control; although the grafting rate of solution grafting is high (Tan Gejiang, Li Tianjin, Ma Jingtao, Fang Jianghua, Ningbo Engineering Institute Journal of the Chinese Academy of Sciences, 19 (2), 2007, 1-5; Wang Qiang, CN200510101318.X), but need a large amount of solvents, the cost is high, the solvent is difficult to recycle and causes environmental pollution, and is not easy to large-scale production; Solid phase grafting (Liu Shengpeng, Zhang Liangjun , Tong Shenyi, Xu Lili, Synthetic Resins and Plastics, 22(4), 2005, 10-13, etc.) usually takes a long time, the reaction efficiency is low, and the maleic anhydride reacts on the surface of the substrate, so the grafting is not uniform. Acid anhydride has a strong taste and is not good for the environment; irradiation grafting (Yu Zhiqiang, Gu Hui, Zhang Zhiqian, Tian Maozhong, Materials Science and Technology, 8(1), 2000, 16-20) requires special equipment, and grafting Often on the surface, grafting is uneven

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