Reaction and extruding polymerizing method for nano size dispersion phase phenylethylene multiple block copolymer

A multi-block copolymer and phase styrene technology, which is applied in the field of reactive extrusion polymerization for continuous production of nanoscale dispersed phase styrene block copolymers, can solve the problem of limiting the application of styrene block copolymers and increasing equipment Investment and energy consumption, high production costs and other issues, to achieve the effect of excellent mixing capacity, good social and economic benefits, process flow and short production cycle

Inactive Publication Date: 2005-03-02
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

[0003] At present, the styrenic block copolymers that are widely used are styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene -Butadiene random copolymer (SB), styrene/conjugated diene multi-block copolymer (number of blocks is 5-9), K resin, methyl methacrylate-butadiene-styrene copolymer (MBS), acrylonitrile-butadiene-styrene copolymer (ABS) etc. But, the method that polystyrene block copolymer adopts in industry at home and abroad at present is reactor solution polymerization, such as disclosed in U.S. Patent US3078254 The production process route for the synthesis of SBS by two-step coupling method, the production process route for the synthesis of SBS by the three-step addition method adopted in U.S. Patent US3198774, and the synthesi

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  • Reaction and extruding polymerizing method for nano size dispersion phase phenylethylene multiple block copolymer

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Embodiment 1

[0045] Refrigerate the styrene monomer and butadiene monomer that meet the polymerization requirements of the present invention to -10°C, and transport them to the mixing unit successively according to the styrene / butadiene weight ratio of 80:20 under the delivery of the metering pump. body storage tank, and make the two fully mixed evenly. The mixed monomer and the n-butyllithium initiator are reacted and extruded in a twin-screw extruder to obtain a nanoscale size dispersed phase with a number average molecular weight of 270,000 (the size of the dispersed phase measured by the transmission electron microscope is less than 10 nanometers, and uniform distribution) multi-block styrene / conjugated diene linear block copolymer product A. TEM image see figure 1 . The process conditions are set as follows:

[0046] The temperature of each section of the screw: 20 / 45 / 140 / 180 / 200°C, the mass flow rate of the monomer: 6 kg / hour, the mass flow rate of the initiator: 1.5 g / hour, the s...

Embodiment 2

[0049] product

Embodiment 3

[0051] product

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Abstract

The reaction and extrusion polymerizing process of linear styrene/conjugated diolefin block copolymer with nanometer level dispersed phase of special structure and performance includes the following steps: feeding styrene monomer and conjugated diolefin monomer in certain ratio to the first section of screw extruder, feeding polymerization initiator to the second section, and adding antioxidant and other modifiers to the screw extruder from one side and extruding out. The styrene block copolymer has outstanding percentage elongation at rupture and excellent mechanical performance. The present invention combines polymerization reaction and extrusion to shorten the production period to several minutes, and the whole process has no solvent added and thus no need of complicated solvent separation and purification. Therefore, the present invention has high production efficiency, low power consumption, low cost and less pollution.

Description

technical field [0001] The invention relates to a method for preparing a nanoscale dispersed phase styrenic multi-block copolymer, in particular to a method for continuously producing a nanoscale dispersed phase styrenic block copolymer using a screw extruder as a reactor Reactive extrusion polymerization method. Background technique [0002] Styrenic block copolymer is an important polymer, which is widely used in home appliances, construction, auto parts, asphalt modification, adhesives, packaging and other fields. [0003] At present, the styrenic block copolymers that are widely used are styrene-butadiene-styrene block copolymer (SBS), styrene-isoprene-styrene block copolymer (SIS), styrene -Butadiene random copolymer (SB), styrene / conjugated diene multi-block copolymer (number of blocks is 5-9), K resin, methyl methacrylate-butadiene-styrene copolymer (MBS), acrylonitrile-butadiene-styrene copolymer (ABS) etc. But, the method that polystyrene block copolymer adopts in...

Claims

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Application Information

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IPC IPC(8): B29C47/00C08F297/04
Inventor 郑安呐周颖坚危大福张锴卢红管涌胡福增王书忠
Owner EAST CHINA UNIV OF SCI & TECH
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