Polypropylene composite nucleating agent based on calcium sulfate whiskers and preparing method of polypropylene composite nucleating agent
The technology of calcium sulfate whisker and composite nucleating agent is applied in the field of polypropylene nucleating agent, the composite nucleating agent of calcium sulfate whisker and organic nucleating agent, and can solve the problem of large usage of calcium sulfate whisker, etc. Achieve the effect of improving nucleation capacity, improving mechanical properties and overcoming large dosage
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Embodiment 1
[0013] Embodiment 1: a kind of preparation method of the polypropylene composite nucleating agent based on calcium sulfate whisker of the present embodiment is carried out according to the following steps:
[0014] (1) Surface modification of calcium sulfate whiskers: calcium sulfate whiskers and silane coupling agent at 100 0 C, the stirring rate is 650r / min, uniformly mixed and modified for 5min. Wherein the amount of silane coupling agent is 0.4%;
[0015] (2) Disperse the surface-modified calcium sulfate whiskers obtained in step (1) in absolute ethanol, and ultrasonically obtain a uniformly dispersed modified calcium sulfate whisker dispersion, the ultrasonic frequency is 70kHz~90kHz, Ultrasound time 15min~30min;
[0016] (3) Sodium 4,6-di-tert-butylphenyl phosphate was dissolved in N,N-dimethylformamide, and then mixed with the modified calcium sulfate whisker dispersion obtained in step (2) at high speed Uniformly mixed under stirring conditions to prepare microemuls...
Embodiment 2
[0018] Embodiment 2: Different from Embodiment 1, the surface modifier in step one is stearic acid.
Embodiment 3
[0019] Example 3: Different from Example 1, the surface modifier in step (1) is a titanate coupling agent.
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Abstract
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