Method for preparing shape memory polyurethane resin

A polyurethane resin and memory technology, which is applied in the field of preparation of functional polymer materials, can solve the problems such as the mechanical properties and phase change energy storage properties of materials that are not discussed, and achieve excellent shape memory effect, outstanding shape memory effect, and excellent mechanical properties. Effect

Inactive Publication Date: 2010-12-22
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The shape memory effect of the material is bidirectional, and it can be used repeatedly for shaping. Mechanical properties and phase change energy storage performance

Method used

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  • Method for preparing shape memory polyurethane resin
  • Method for preparing shape memory polyurethane resin
  • Method for preparing shape memory polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 11.6g dehydrated molecular weight is 10000 polyethylene glycol, 6.6g dehydrated polyethylene glycol with 6000 molecular weight, 17.5g dehydrated polybutylene adipate glycol with 3000 molecular weight and 11.6g Diphenylmethane-4,4'-diisocyanate was mixed uniformly in the reactor and then prepolymerized at 25°C for 3 minutes; then 3.4g of 1,4-butanediol was added, stirred evenly and poured into the mold, at 70 chain extension reaction at 120°C for 20 hours; then aging at 120°C for 2 to 2.5 hours to obtain a shape-memory polyurethane resin.

[0029]A kind of shape-memory polyurethane resin obtained in this embodiment is a kind of shape-memory polyurethane resin containing different molecular weight polyethylene glycols and polyester diols, which can be obtained from Table 1. The shape-memory recovery rate of this polyurethane can reach 88%, and the permanent The deformation rate can reach 95%, showing a good shape memory effect. Depend on figure 1 It can be obtained that...

Embodiment 2

[0031] 13.1g dehydrated molecular weight polyethylene glycol of 10000, 7.9g dehydrated polyethylene glycol of 6000 molecular weight, 17.5g dehydrated polybutylene adipate diol of 3000 molecular weight and 11.7g Diphenylmethane-4,4'-diisocyanate was mixed uniformly in the reactor and then prepolymerized at 20°C for 3 minutes; then 3.4g of 1,4-butanediol was added, stirred evenly and poured into the mold, at 70 chain extension reaction at 120°C for 20 hours; then aging at 120°C for 2 to 2.5 hours to obtain a shape-memory polyurethane resin.

[0032] A kind of shape-memory polyurethane resin that this embodiment obtains is a kind of shape-memory polyurethane resin that contains different molecular weight polyethylene glycols and polyester diols, and tensile stress-strain test records that the tensile strength of this resin is 13MPa, and elongation at break is 640%. The phase transition enthalpy of the resin measured by differential scanning calorimetry was 26 J / g, and the phase ...

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Abstract

The invention discloses a method for preparing shape memory polyurethane resin. Polyethylene glycol is added during synthesis, and polyether diol or polyester diol is added as a soft segment; and the shape memory polyurethane resin is synthesized by a mass polymerization method. Compared with the shape memory polyurethane resin with single polyethylene glycol or polyether diol or polyester diol as the soft segment, the polyurethane resin prepared by the method has the characteristics of good shape memory effect, high phase change thermal insulation performance, high mechanical performance and the like; the shape memory recovery rate can reach 88%, the permanent deformation rate can reach 95%, the tensile strength at break can reach 20 MPa and the elongation at break can reach 75%; and meanwhile, a stable phase change enthalpy is kept, the requirements of spinning-level resin are met and the shape memory polyurethane resin can be directly spun and formed.

Description

technical field [0001] The invention relates to a preparation method of a functional polymer material, in particular to a preparation method of a shape-memory polyurethane resin. Background technique [0002] The shape recovery of shape memory polymers can be stimulated by heat, light, electricity and other external conditions. Shape memory polyurethane uses hard segments with physical cross-linking points as the stationary phase. These physical cross-linking points are generated through polarity, hydrogen bonding and crystallization. The soft segments contain reversible phases, and the shape of polyurethane elastomers appears The memory effect is formed by the rotation of the soft segment. When the temperature rises to the glass transition temperature T g In the above situation, the micro-Brownian motion of the molecular chain of the soft segment is intensified, while the hard segment is still in a solidified state. At this time, a certain external force is used to deform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/42C08G18/12D01F6/78
Inventor 陈文庭郑震龚园园王新灵施楣梧
Owner SHANGHAI JIAO TONG UNIV
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