Foamed polypropylene composition, foamed polypropylene plate and preparation method thereof
A technology of foamed polypropylene and polypropylene, which is applied in the field of foamed polypropylene composition, foamed polypropylene sheet and its preparation, can solve the problems of poor cell quality and affecting the mechanical properties of materials, and achieve smooth surface and durable High thermo-oxidative aging performance and uniform pore size distribution
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[0031] According to a preferred embodiment of the present invention, the composition content of the mixed C4 can be 5-10% by weight of 1-butene, 5-15% by weight of isobutene, 10-20% by weight of 1,3-butadiene, 1 , 5-15% by weight of 2-butadiene, 0.5-5% by weight of n-butane, 0.5-2% by weight of isobutane, 20-40% by weight of cis-2-butene, 2-10% by weight of trans-2-butene %, vinyl acetylene 5-20% by weight.
[0032] According to another preferred embodiment of the present invention, the composition content of the mixed C4 can be 0.1-2% by weight of 1-butene, 10-30% by weight of isobutene, 0.01-0.1% by weight of 1,3-butadiene, 0.5-5% by weight of n-butane, 30-40% by weight of isobutane, 20-40% by weight of cis-2-butene, and 5-20% by weight of trans-2-butene.
[0033] According to another preferred embodiment of the present invention, the composition content of the mixed C4 can be 5-15% by weight of 1-butene, 0.5-3% by weight of isobutene, 20-30% by weight of n-butane, cis-2-bu...
preparation example 1
[0106] Polypropylene HMSPP101 and HMSPP102 were prepared respectively according to the methods of Example 1 and Example 2 in CN102134290A.
[0107] HMSPP101: The melt flow rate at 230° C. and a load of 2.16 kg is 1.6 g / 10 min, the molecular weight distribution Mw / Mn is 11.2, and the dispersion index PI is 15.0. The density is 0.895-0.905g / cm 3 within range.
[0108] HMSPP102: The melt flow rate at 230° C. and a load of 2.16 kg is 2.7 g / 10 min, the molecular weight distribution Mw / Mn is 11.1, and the dispersion index PI is 9.3. The density is 0.895-0.905g / cm 3 within range.
preparation example 2
[0110] Preparation of Mixed Butene-Maleic Anhydride Copolymer Microspheres
[0111] Mixed butene-maleic anhydride copolymer microsphere powder A:
[0112] Under nitrogen protection, 15kg of mixed C4A is passed into a 200L reactor containing 22kg of maleic anhydride, 2.6kg of azobisisobutyronitrile and 100L of isoamyl acetate to carry out a copolymerization reaction. The reaction pressure is 0.98MPa, the copolymerization reaction temperature is 75°C, and the copolymerization reaction time is 6h;
[0113]Pass the copolymerization reaction product into the flash separator for gas-liquid separation at 25°C and 0MPa. The obtained liquid-solid mixture continues to be separated in the centrifuge at 4000rpm and centrifuged for 20min to obtain a solid product. Wash with hexane, filter the obtained filter cake through a sand core funnel and vacuum dry at 90°C for 8 hours to obtain mixed butene-maleic anhydride copolymer microsphere powder A. The copolymer powder was tested, wherein ...
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