Poly-((methyl) crylic acid-b-styrene-b-butadiene-b-styrene) segmented copolymer latex and preparation method thereof

A technology of block copolymer and methacrylic acid, which is applied in the field of polymers, can solve the problems of low final conversion rate, slow reaction speed, long reaction polymerization inhibition period, etc., and achieve the effects of low viscosity, small pollution and fast heat transfer

Active Publication Date: 2012-07-18
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main problem of the failure of styrene RAFT emulsion polymerization is that the polyacrylic amphiphilic macromolecular reversible addition chain scission chain transfer reagent must be dissolved by adding alkali due to the inappropriate length ratio of hydrophilic and lipophilic segments. In water, the pH value of the formed aqueous solution is ≥ 5.5, and the r

Method used

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  • Poly-((methyl) crylic acid-b-styrene-b-butadiene-b-styrene) segmented copolymer latex and preparation method thereof
  • Poly-((methyl) crylic acid-b-styrene-b-butadiene-b-styrene) segmented copolymer latex and preparation method thereof
  • Poly-((methyl) crylic acid-b-styrene-b-butadiene-b-styrene) segmented copolymer latex and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add 80 parts by weight of water, 2 parts by weight of amphiphilic macromolecular reversible addition-fragmentation chain transfer reagent macroRAFT1 (its chemical structure is shown below by proton nuclear magnetic resonance analysis), and 10 parts by weight of styrene into the reactor, Stir and mix, blow nitrogen for 30 minutes, heat up to 70°C, add 0.04 parts by weight of potassium persulfate, react for 45 minutes, add 0.5 parts by weight of sodium hydroxide, add 0.5 parts by weight of sodium dodecyl sulfate (SDS) , after fully mixing, add 30 parts by weight of butadiene, add 0.005 parts by weight of potassium persulfate, react for 50 minutes, slowly release the pressure, discharge unreacted butadiene from the reactor, and then add 10 parts by weight of benzene Ethylene, continue to react for 30 minutes, cool and discharge, add terminator hydroquinone THF solution (1%) to obtain block copolymer latex. figure 1 Showing the evolution of the GPC molecular weight of the r...

Embodiment 2

[0038] Add 100 parts by weight of water, 1 part by weight of amphiphilic macromolecular reversible addition-fragmentation chain transfer reagent macroRAFT2 (its chemical structure is shown below by proton nuclear magnetic resonance analysis), and 10 parts by weight of styrene into the reactor, Stir and mix, blow nitrogen for 60 minutes, heat up to 70°C, add 0.04 parts by weight of potassium persulfate, react for 45 minutes, add 0.5 parts by weight of sodium hydroxide, add 0.4 parts by weight of sodium dodecyl sulfate (SDS ), after fully mixing, add 20 parts by weight of butadiene, add 0.02 parts by weight of potassium persulfate, react for 4 hours, slowly release the pressure, discharge unreacted butadiene from the reactor, and then add 10 parts by weight of Styrene, continue to react for 30 minutes, cool and discharge, add terminator hydroquinone THF solution (1%) to obtain block copolymer latex. The design and measured molecular weight of each block of the obtained block cop...

Embodiment 3

[0042] 40 parts by weight of water, 0.2 parts by weight of amphiphilic macromolecular reversible addition-fragmentation chain transfer reagent macroRAFT1 (its chemical structure is the same as shown in Example 1), and 4 parts by weight of styrene are added to the reactor, stirred and mixed, and passed Nitrogen for 30 minutes, heat up to 70°C, add 0.04 parts by weight of potassium persulfate, react for 45 minutes, add 0.5 parts by weight of sodium hydroxide, add 0.1 parts by weight of sodium dodecyl sulfate (SDS), and mix well Finally, add 18 parts by weight of butadiene, add 0.1 parts by weight of potassium persulfate, react for 6 hours, slowly release the pressure, discharge unreacted butadiene from the reactor, add 4 parts by weight of styrene, and continue the reaction After 30 minutes, the material was cooled and discharged, and a terminator hydroquinone THF solution (1%) was added to obtain the latex of the block copolymer. The design and measured molecular weight of each...

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Abstract

The invention discloses a poly-((methyl) crylic acid-b-styrene-b-butadiene-b-styrene) segmented copolymer latex and a preparation method thereof. An amphiphilic macromolecule reversible addition fracture chain transfer reagent adopted by the latex not only serves as a chain transfer reagent but also serves as a reaction type emulsifier. Stable poly-((methyl) crylic acid-b-styrene-b-butadiene-b-styrene) segmented copolymer latex is directly obtained through emulsion polymerization reaction. The preparation method is simple, environment-friendly and energy-saving in process, and the poly-((methyl) crylic acid-b-styrene-b-butadiene-b-styrene) segmented copolymer latex product has broad application prospects in the fields of modified asphalt, adhesives, polymer toughening modification and thelike.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a poly((meth)acrylic acid-b-styrene-b-butadiene-b-styrene) block copolymer latex and a preparation method thereof. Background technique [0002] As an important styrenic thermoplastic elastomer (TPS), poly(styrene-b-butadiene-b-styrene) (SBS) has important industrial applications, including asphalt modification, Adhesives, shoemaking, polymer toughening modification and many other aspects. SBS has the characteristics of plasticizing at high temperature and showing the characteristics of rubber elastic body at room temperature. The thermodynamic incompatibility of polystyrene block / polybutadiene block makes it produce microphase separation, and the micro-domains of polystyrene block are dispersed in the continuous phase of polybutadiene block. To the effect of physical cross-linking point, heating above the melting temperature of polystyrene, the micro-domain structure disappea...

Claims

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Application Information

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IPC IPC(8): C08F293/00C08F2/38C08F2/24C09D153/00C09J153/00
CPCC09J153/00C08F2/22C08F293/00C09D153/00C08F293/005C08F2/38C08F2/24C08F2438/03C08L47/00
Inventor 罗英武魏任重高翔
Owner ZHEJIANG UNIV
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