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Acrylate polymer having side chain crystallinity and preparation method thereof

A carbon chain acrylate and acrylate technology, applied in the field of polymer materials, can solve the problems of low crystallization melting temperature, partial melting or dissolution, failure to meet performance requirements, etc., and achieve the effect of improving firmness and compatibility

Inactive Publication Date: 2013-12-18
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many applications, the melting temperature of such crystals is still too low. Due to the dissolution and erosion of coexisting components and the influence of the environment, the polymer crystallization region is prone to local melting or dissolution at room temperature, which cannot meet the ideal performance requirements.

Method used

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  • Acrylate polymer having side chain crystallinity and preparation method thereof
  • Acrylate polymer having side chain crystallinity and preparation method thereof
  • Acrylate polymer having side chain crystallinity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12

[0032] Add 1.05mol of thiourea to 100ml of water and 100ml of concentrated hydrochloric acid, stir, and heat gently to dissolve the thiourea completely, then add 0.5mol of polyether glycol, lower the temperature properly to prevent overheating, and control the system to react at 30-60°C for 10 ~15 hours, then treated with excess concentrated sodium hydroxide solution, separated and purified, and dried to obtain a polyether chain transfer agent with a chain end of mercapto group. The product was detected by infrared absorption light. It originally appeared above 3000cm-1, and the infrared absorption peak attributed to hydroxyl group was basically small, but newly appeared around 2560cm-1, and the characteristic absorption peak attributed to sulfhydryl group appeared.

[0033] Various PEGs and PTMGs with a molecular weight of 200-3000 are suitable for this synthesis method, see Table 1 for details.

[0034] Table 1 Examples of converting polyether diols with different molecular ...

Embodiment 13～39

[0037] The side chain crystalline polymer of the present invention is obtained by solution polymerization, specifically, dissolving ultra-long carbon chain acrylate monomer, acrylic acid, dimercapto-terminated polyether chain transfer agent, and initiator AIBN in toluene solvent, heating and polymerizing for a long enough time. Sampling is carried out for infrared absorption spectrum detection to confirm that the conversion of the monomer is basically complete, the temperature is lowered, and a mixed precipitant of methanol and diethylene glycol is slowly added dropwise under stirring to obtain a side chain crystalline polymer. The molar ratio of ultra-long carbon chain acrylate monomer, AIBN, and dimercapto-terminated polyether is 100:5-7:0.5-1.5, toluene is used as a solvent, and the mass percent concentration of the monomer in toluene is controlled to be lower than 40%. The amount of acrylic acid used is controlled to be 2-4% of the molar weight of the ultra-long carbon cha...

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Abstract

The invention discloses an acrylate polymer having side chain crystallinity and a preparation method thereof. The acrylate polymer having side chain crystallinity is an ABA type three-segmented copolymer, wherein A is a homopolymer chain segment of acrylate having an over-long carbon chain or a copolymer chain segment of acrylate having the over-long carbon chain and acrylic acid; B is a polyether chain segment formed by disulfydryl-terminated polyether; and the A segment and the B segment are connected through a thioether bond. The preparation method of the acrylate polymer having the side chain crystallinity comprises the step of carrying out polymerization reaction on acrylate having the over-long carbon chain, an initiator and disulfydryl-terminated polyether for more than 16 hours at the temperature of 60-80 DEG C based on azodiisobutyronitrile as the initiator and toluene as a solvent until the monomers are completely transformed, so as to obtain the acrylate polymer having the side chain crystallinity. The acrylate polymer having the side chain crystallinity can be applied to polymer carbon powder, paint, ink and adhesive formula for improving the property.

Description

technical field [0001] The invention belongs to the field of polymer materials, in particular to an acrylate polymer with side chain crystallinity and a preparation method thereof. Background technique [0002] Side chain crystalline polymers are generally based on an amorphous main chain backbone, and the side chains can be crystallized. When this type of polymer exists below its crystalline melting point, the polymer is in the form of crystals, and when it exists alone, it appears as a solid, but when it is mixed with other liquid resins and monomers, the amorphous region of the polymer is partially absorbed by the liquid resin or monomer. Dissolution makes the mixed system present a heterogeneous characteristic with extremely high viscosity. Once heated to the vicinity of the melting point of the side chain crystalline polymer, the side chain crystalline region melts, and the polymer can sharply reduce the viscosity of the mixed system. After cooling, the dissolved polym...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F293/00C08F120/18C08F220/18C08F220/06C08F2/38C08G65/48C08G65/334C09D153/00C09J153/00C09D11/00
Inventor 杨建文曾兆华庞来兴
Owner SUN YAT SEN UNIV