Triple shape memory cyanate ester and preparation method thereof

A technology of cyanate ester and cyanate ester prepolymer, which is applied in the field of shape memory polymer synthesis, can solve the problems of limiting the types of optional resins, the separation of glass transition peaks is not obvious, and the glass transition temperature range of resin is narrow. Triple shape memory performance, achieve selective shape recovery, achieve selective drive deformation effect

Active Publication Date: 2022-07-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When two resins are blended to prepare triple SMPs, the two resins must have good compatibility, and the curing method is single, generally heat curing, which greatly limits the types of optional resins
When polymers are grafted to prepare SMPs, the preparation method is tedious and complicated and there are many influencing factors. Factors such as molecular structure, molecular weight, and grafting success rate can all affect the triple shape memory properties of the resin, resulting in a narrow glass transition temperature range or glass transition of the resin. The peak separation is not obvious, and the shape recovery of the two temporary shapes interferes with each other, which is not conducive to subsequent applications

Method used

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  • Triple shape memory cyanate ester and preparation method thereof
  • Triple shape memory cyanate ester and preparation method thereof
  • Triple shape memory cyanate ester and preparation method thereof

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preparation example Construction

[0040] Optionally, the preparation method of the cyanate ester prepolymer includes: dissolving the cyanate ester monomer at 110-120° C., then heating and stirring continuously for 180-220 h, and cooling to room temperature to prepare the cyanate ester monomer. ester prepolymer. figure 1 The morphology of the cyanate ester prepolymer at different heating times is shown.

[0041] Optionally, the cyanate monomer is bisphenol A cyanate.

[0042] Optionally, the epoxy resin is selected from one or more of bisphenol A epoxy resin, bisphenol F epoxy resin, cyanuric epoxy resin, novolac epoxy resin and hydantoin epoxy resin .

[0043] Optionally, the epoxy acrylate is selected from bisphenol A epoxy acrylate, bisphenol F epoxy acrylate, cyanuric epoxy acrylate, novolac epoxy acrylate and hydantoin epoxy acrylate one or more of.

[0044] Optionally, the acrylate is selected from polyethylene glycol diacrylate, polypropylene glycol diacrylate, neopentyl glycol diacrylate, dipropylen...

Embodiment 1

[0054] A triple shape memory cyanate ester, comprising in parts by weight: 30 parts of cyanate ester prepolymer, 15 parts of bisphenol A epoxy resin, 20 parts of bisphenol A epoxy acrylate, 30 parts of polyethylene glycol diacrylic acid ester, 5 parts of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide;

[0055] The preparation method includes the following steps:

[0056] S1. Preparation of printable ink: by weight, mix cyanate ester prepolymer, epoxy resin, epoxy acrylate, acrylate and photoinitiator uniformly to prepare printable ink;

[0057] Wherein, the preparation method of the cyanate ester prepolymer includes: dissolving the cyanate ester monomer at 120° C., then magnetically stirring slowly, continuously heating and stirring for 192 hours, and cooling to room temperature;

[0058] S2, light-curing printing and molding: using a light-curing printer to print the printable ink, in this example, a six-petal flower structure is obtained by printing;

[0059] S3. Construct...

Embodiment 2

[0065] A triple shape memory cyanate ester, comprising in parts by weight: 40 parts of cyanate ester prepolymer, 10 parts of bisphenol A epoxy resin, 15 parts of bisphenol A epoxy acrylate, 30 parts of trimethylolpropane triglyceride Acrylate, 5 parts of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide;

[0066] The preparation method includes the following steps:

[0067] S1. Preparation of printable ink: by weight, mix cyanate ester prepolymer, epoxy resin, epoxy acrylate, acrylate and photoinitiator uniformly to prepare printable ink;

[0068] Wherein, the preparation method of the cyanate ester prepolymer includes: dissolving the cyanate ester monomer at 120° C., then magnetically stirring slowly, continuously heating and stirring for 192 hours, and cooling to room temperature;

[0069] S2, light-curing printing and forming: using a light-curing printer to print the printable ink;

[0070] S3. Constructing an interpenetrating network: the printed object is irradiated with ...

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Abstract

The invention provides triple shape memory cyanate ester and a preparation method thereof, and belongs to the technical field of shape memory polymer synthesis. The triple shape memory cyanate is prepared from the following components in parts by weight: 30 to 40 parts of cyanate prepolymer, 10 to 20 parts of epoxy resin, 10 to 20 parts of epoxy acrylate, 20 to 30 parts of acrylate and 2 to 5 parts of photoinitiator; the cyanate prepolymer and the epoxy resin are used for forming a thermal initiation polymerization network under thermal initiation, and the epoxy acrylate and the acrylate are used for forming a photo-initiation polymerization network under photo-initiation. According to the invention, an interpenetrating network structure is formed by using a thermal-initiated polymerization network structure and a photo-initiated polymerization network, and the reversible phases and the stationary phases of the two network structures are different and the distance between glass transition temperature peaks is far, so that mutual interference in multiple shape recovery processes is small, and excellent triple shape memory performance is ensured; and selective driving deformation and selective shape recovery can be realized.

Description

technical field [0001] The invention relates to the technical field of shape memory polymer synthesis, in particular to a triple shape memory cyanate ester and a preparation method thereof. Background technique [0002] Shape memory polymers (SMPs) are a new class of smart materials with shape memory capabilities, that is, at the glass transition temperature, they are given a temporary shape, and the temporary shape is fixed by cooling, and can recover when subjected to external stimuli. to the initial shape, thus showing a memory function for the initial shape. Compared with shape memory alloys and shape memory ceramics, shape memory polymers have many advantages such as low density, large recoverable deformation, easy processing and forming, and adjustable deformation temperature, so they exist in flexible electronics, biomedicine, aerospace and other fields. Broad application prospects. The currently developed shape memory polymer materials are mainly dual shape memory ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08L63/02C08L63/10C08L71/02C08F283/10C08F283/00C08F222/14
CPCC08L79/04C08F283/10C08F283/105C08F283/00C08L2205/04C08L2201/12C08L63/00C08L63/10C08L71/02C08F222/103Y02P20/10
Inventor 冷劲松王林林张风华刘彦菊
Owner HARBIN INST OF TECH
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