Preparation method of polypropylene nano composite material
A technology of nanocomposite materials and polypropylene, which is applied in the field of polymer materials, can solve problems such as no method for solving nanoparticle agglomeration, and achieve the effects of reducing agglomeration, enhancing modification effects, and improving toughness
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Embodiment 1
[0049] 50 grams of β crystal nucleating agent zinc phthalate (the dibasic carboxylic acid organic class β crystal nucleating agent of the IIB group element), 300 grams of organically modified nano-calcium carbonate (the brand is YH306) and 2 grams respectively Antioxidant (1010 and 168 are respectively 1 gram) mix, add respectively to 1000 grams of maleic anhydride grafted polypropylene (brand is PP-G-1, melt flow rate 2.16g / 10min, grafting rate 0.8%) , mixed uniformly in a high mixer, extruded and granulated with a twin-screw extruder, and respectively made into a masterbatch with a nucleating agent content of 5% and a masterbatch with a nano calcium carbonate content of 30%. Then respectively take by weighing 20 grams of maleic anhydride grafted polypropylene masterbatch adding PA-01 and 217 grams of maleic anhydride grafted polypropylene masterbatch adding nano-calcium carbonate, and 763 grams of polypropylene (homopolymer, trade mark T30S Melt flow rate 2.5g / 10min, density...
Embodiment 2
[0053] Step is identical with embodiment 1, wherein matrix homopolypropylene is changed into block copolymerization polypropylene (brand C180, melt flow rate 0.3g / 10min (230 ℃, 2.16kg)), the content of the nano calcium carbonate of organic modification 35%. In the mixture, the weight percentages of nucleating agent and nano-calcium carbonate are 2% and 3.5% respectively, and the properties of the obtained material are as follows: the notched impact strength is 785.4J / m, the flexural modulus is 1010MPa, and the heat distortion temperature is 106°C .
[0054] As a comparison, the notched impact strength of pure copolymerized polypropylene is 486.7J / m, the flexural modulus is 903MPa, and the heat distortion temperature is 84°C.
Embodiment 3
[0056] The steps are the same as in Example 1, wherein the β crystal nucleating agent is replaced by NABW (amide β crystal nucleating agent), and the content is 5%; the content of organically modified nano-calcium carbonate is 20%. In the mixture, the weight percent concentrations of the nucleating agent NABW and the organically modified nano-calcium carbonate are 0.1% and 5% respectively. The properties of the obtained material are as follows: the notched impact strength is 37.2 J / m, the flexural modulus is 1088 MPa, and the heat distortion temperature is 98°C.
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