Application of carboxylic acid metal salt of tetrahydrophthalic anhydride as nucleating agent for polypropylene beta crystal form
A technology of metal carboxylate and tetrahydrophthalic anhydride is applied in the field of nucleating agents, which can solve the problems of complex components and complex preparation methods, and achieve the effects of good dispersion, wide application conditions and improved impact strength.
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[0029] The present invention can be further illustrated by the following examples, but what is provided here are only the preferred embodiments of the present invention, and the scope of the present invention is not limited by this.
[0030] The polypropylene PP used in the following experiment is F401 produced by Sinopec Yangzi Petrochemical Co., Ltd.
[0031] Preparation of sample 1#: Add the nucleating agent of calcium tetrahydrophthalate with a mass of 0.05%, 0.10%, 0.20% and 0.30% of the polypropylene mass to PP (F401) pellets (PP mass is 1000g as Benchmark), after mixing in a high-speed mixer for 5 minutes, twin-screw kneading and extrusion granulation, and then injection molding to make polypropylene PP (F401) standard sample strips. The extrusion temperature is 190-210℃, and the temperature of each section of the injection molding machine is 220-230℃.
[0032] Preparation of sample 2#: Add the nucleating agent of zinc tetrahydrophthalate with a mass of 0.05%, 0.10%, 0.20% an...
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