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Synthesis method of transparent block copolymer

A technology of a block copolymer and a synthesis method, which is applied to the synthesis field of transparent block copolymers, can solve the problems of many feeding times and synthesis steps, easy introduction of impurities in the preparation process, and increase of experimental failures, and achieves simple steps and physical properties. The effect of good mechanical properties and simple equipment

Active Publication Date: 2012-07-11
宁波长鸿高分子科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] So far, although many patents have explained the preparation process and structure of block copolymers of aromatic monoolefins and conjugated dienes, it is known from the above and other related patents that most of the preparation processes are relatively complicated, and there are times of addition and There are many synthesis steps, etc.
Since the synthesis of such block copolymers needs to be carried out under harsh conditions of anhydrous and oxygen free, the more complicated the preparation process is, the easier it is to introduce impurities, which leads to an increase in the probability of experimental failure

Method used

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  • Synthesis method of transparent block copolymer
  • Synthesis method of transparent block copolymer
  • Synthesis method of transparent block copolymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Table 1 lists the compounds charged to the reactor, the amounts of these compounds charged to the reactor, the time these compounds were reacted in the reactor and the reactor temperature. The produced block copolymer has a light transmittance of 88%, a tensile strength of 34MPa and an elastic modulus of 0.79GPa, and a notched Izod impact strength of 14J / m. It also has a number-average molecular weight of 57392 and 97155 The weight average molecular weight (measured according to gel permeation chromatography).

Embodiment 2

[0036]Table 2 lists the compounds charged to the reactor, the amounts of these compounds charged to the reactor, the time these compounds were reacted in the reactor and the reactor temperature. The produced block copolymer has a light transmittance of 84%, a tensile strength of 35MPa and an elastic modulus of 0.61GPa, and a notched Izod impact strength of 13J / m. It also has a number-average molecular weight of 59726 and 104281 The weight average molecular weight (measured according to gel permeation chromatography).

Embodiment 3

[0038] Table 3 lists the compounds charged to the reactor, the amounts of these compounds charged to the reactor, the time these compounds were reacted in the reactor and the reactor temperature. The produced block copolymer has a light transmittance of 84%, a tensile strength of 46MPa and an elastic modulus of 1.02GPa, and a notched Izod impact strength of 13J / m. It also has a number-average molecular weight of 61050 and 99839 The weight average molecular weight (measured according to gel permeation chromatography).

[0039]

[0040]

[0041]

[0042]

[0043]

[0044] Test Results

[0045] like figure 1 The thermogravimetric spectrum of the transparent block copolymer is shown. The corresponding temperature T when the block copolymer decomposes 5% by mass 5% The maximum decomposition temperature is 402°C, and the maximum decomposition temperature is 450°C, which shows that the block copolymer has good processability and good thermal stability, and it star...

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Abstract

The invention discloses a synthesis method of transparent block copolymer, which comprises the following steps of: mixing diluent and polar compounds of 60 to 90 percent of the total weight of diluent, initiator of 40-70 percent and monovinylarene aryl hydrocarbon of 20-30 percent of total monomer under conditions with no water or oxygen but with high-purity argon, and vigorously stirring for 40-80min at 50-80 DEG C; adding monovinylarene aryl hydrocarbon of 13-22 percent of total monomer, and stirring 40-80min; adding conjugated diene of 4-7 percent of total monomer, and stirring for 40-80min; adding initiator of 30-60 percent and monovinylarene of 18-25 percent of total monomer, and stirring for 40-80min; adding conjugated diene of 18-20 percent of total monomer into a polymerization reactor, and making mixture react for 40-80min; adding monovinylarene aryl hydrocarbon into the polymerization reactor, making mixture reactor for 40-80 min, and adding CO2; and adding methanol or ethanol to prepare polymerization products, and naturally drying the polymerization products. The invention has the advantages of no coupling, simple steps and high transmittance.

Description

technical field [0001] The invention belongs to the technical field of block copolymers, in particular to a method for synthesizing transparent block copolymers. Background technique [0002] At present, transparent plastic products are used more and more widely in the world, and the fields can involve toy production, medical equipment, hard and flexible packaging, containers, household appliances, displays and clothes hooks, etc., and have greater market competitiveness. Commonly used transparent plastic materials include acrylic resin, polycarbonate, styrene-acrylonitrile copolymer, styrene-methyl methacrylate copolymer, polyvinyl chloride, and polyethylene terephthalate. From the perspective of raw materials, preparation process and product performance, the block copolymer prepared by solution polymerization of aromatic monoolefin such as styrene and conjugated diene such as 1,3-butadiene is different from the above-mentioned commonly used transparent Compared with plast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F297/04
Inventor 陶春风张艳彭冲庄明方征平湖选哲
Owner 宁波长鸿高分子科技股份有限公司
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