CN110078892A - A kind of lower shape memory polyurethane material of new infrared stimulation - Google Patents
A kind of lower shape memory polyurethane material of new infrared stimulation Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2280/00—Compositions for creating shape memory
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Abstract
The invention discloses a kind of new infrareds to stimulate lower shape memory polyurethane material, comprising: 35~50 parts of polytetramethylene ether diol；15~25 parts of diisocyanate；10~15 parts of chain extender；0.05~0.12 part of catalyst；120~250 parts of organic solvent；Crosslinking agent；Wherein, the additional amount of crosslinking agent meets:In above formula, M1For the mass fraction of polytetramethylene ether diol, M2For the mass fraction of diisocyanate, M3For the mass fraction of chain extender, M4For the mass fraction of catalyst, M5For the mass fraction of organic solvent,
Description
Technical field
The present invention relates to a kind of new infrareds to stimulate lower shape memory polyurethane material, belongs to memory material field.
Background technique
Shape memory high molecule (SMP) is a kind of novel functional polymer material, be high molecular material research, exploitation,
Application a new branch point, it simultaneously with plastics and rubber characteristic.With to macromolecular structure and characteristic understanding
In-depth and macromolecule synthesising technology development, make high molecular material by MOLECULE DESIGN obtain expected structure and performance at
For reality.Shape memory high molecule is exactly with modern Polymer Physics theory and Polymer Synthesizing and modification technology, to logical
Carry out molecular combinations and the modified a kind of high molecular material obtained with high molecular material, as polyethylene, polyisoprene, polyester,
The high molecular materials such as copolyesters, polyamide, copolyamide, polyurethane carry out the adjustment of MOLECULE DESIGN and molecular structure, make them
Under certain condition, it is endowed certain shape (playing primary state), when external condition changes, it can correspondingly change shape
And it is fixed (deformation states).If external environment changes with rule again in a particular manner, what they can be inverse is extensive
It is multiple extremely to play a primary state.So far, the circulation of " remembered primary state-fixed deformation state-recovery and played primary state " is completed.
Due to the shape-memory properties stimulation mode multiplicity of shape memory polyurethane material, application field is also more, therefore inhales
The attention of numerous researchers is drawn.But existing shape memory polyurethane material will appear showing for low response rate in the application
As, and so that memory effect is not able to satisfy ideal demand, therefore be obstructed in extensive use.
Summary of the invention
The present invention has designed and developed a kind of lower shape memory polyurethane material of new infrared stimulation, passes through control crosslinking agent
Additional amount makes shape memory polyurethane material have good memory performance and higher response rate.
Another goal of the invention of the invention, by pulsed infrared stimulator shape memory polyurethane material cross-linking process
It is middle to carry out infrared stimulation, infrared stimulation time is controlled, cross-linking reaction is promoted to carry out, further increases returning for shape memory polyurethane
Multiple rate.
Technical solution provided by the invention are as follows:
A kind of lower shape memory polyurethane material of new infrared stimulation, comprising:
The new infrared stimulates lower shape memory polyurethane material to be composed of the following parts by weight:
35~50 parts of polytetramethylene ether diol；
15~25 parts of diisocyanate；
10~15 parts of chain extender；
0.05~0.12 part of catalyst；
120~250 parts of organic solvent；
Crosslinking agent；
Wherein, the additional amount of crosslinking agent meets:
In above formula, M1For the mass fraction of polytetramethylene ether diol, M2For the mass fraction of diisocyanate, M3To expand
The mass fraction of chain agent, M4For the mass fraction of catalyst, M5For the mass fraction of organic solvent,For the basis of crosslinking agent
Mass fraction, e are the natural logrithm truth of a matter.
Preferably, the diisocyanate is 4,4 '-diphenylmethane diisocyanates.
Preferably, the chain extender is Isosorbide-5-Nitrae butanediol.
Preferably, the catalyst is dibutyl tin dilaurate.
Preferably, the crosslinking agent is trimethylolpropane.
Preferably, the new infrared stimulates the preparation method of lower shape memory polyurethane material to include the following steps:
Weighed polytetramethylene ether diol is added in step 1 in the reactor, in the case where vacuum nitrogen protects atmosphere, divides more
It is secondary that weighed 4,4 '-diphenylmethane diisocyanate is added, after stirring 30~60min, weighed dibutyl tin dilaurate is added,
Prepolymerization reaction is carried out, reaction temperature is 70~90 DEG C, and the reaction time is 1~2h, obtains performed polymer；
Weighed Isosorbide-5-Nitrae butanediol is added in performed polymer by step 2, carries out chain extending reaction, and reaction temperature is 75~85
DEG C, mixing time is 2~3h, and crosslinking agent is added, and is crosslinked under pulsed infrared laser light stimulation, obtains reaction product；
After cooling down reactant, on a glass, curing is dried, drying temperature is 120~130 Celsius in step 3
Degree, drying time are 2~4 days.
Preferably, in the step 2, pulsed infrared laser light stimulation time t is
Wherein, t0For basic pulsed infrared laser light stimulation time, PwFor the steady state power of pulsed infrared laser light stimulator, Pe
For the rated power of pulsed infrared laser light stimulator, ω is pulsewidth, ω0For basic pulsewidth.
Preferably, the molecular weight of the polytetramethylene ether diol is 2000~3500.
It is of the present invention the utility model has the advantages that new infrared of the invention stimulates lower shape memory polyurethane material using control
The additional amount of crosslinking agent makes shape memory polyurethane material have good memory performance and higher response rate.Simultaneously as
Infrared stimulation is carried out in cross-linking process, controls infrared stimulation time, is promoted cross-linking reaction to carry out, is further increased shape memory
The response rate of polyurethane makes shape memory polyurethane material have excellent performance and use value.
Specific embodiment
The present invention is described in further detail below, to enable those skilled in the art's refer to the instruction text being capable of evidence
To implement.
The present invention provides a kind of lower shape memory polyurethane material of new infrared stimulation, complete in prepolymerization reaction and chain extending reaction
Cheng Hou carries out cross-linking reaction by the way that crosslinking agent is added, and adjusts the additional amount of crosslinking agent, improves the reply of shape memory polyurethane
Rate, meanwhile, infrared stimulation is being carried out in cross-linking process, is promoted cross-linking reaction to carry out, is further increased shape memory polyurethane
Response rate, make shape memory polyurethane material have excellent performance and use value.
New infrared stimulates lower shape memory polyurethane material to be grouped as by the group of mass fraction once:
35~50 parts of polytetramethylene ether diol；
15~25 parts of diisocyanate；
10~15 parts of chain extender；
0.05~0.12 part of catalyst；
120~250 parts of organic solvent；
Crosslinking agent；
Wherein, the additional amount of crosslinking agent meets:
In above formula, M1For the mass fraction of polytetramethylene ether diol, M2For the mass fraction of diisocyanate, M3To expand
The mass fraction of chain agent, M4For the mass fraction of catalyst, M5For the mass fraction of organic solvent,For the basis of crosslinking agent
Mass fraction is 10 parts, and e is the natural logrithm truth of a matter.
In the present invention, as a preference, diisocyanate selects 4,4 '-diphenylmethane diisocyanates.
In the present invention, as a preference, chain extender selects Isosorbide-5-Nitrae butanediol.
In the present invention, as a preference, catalyst selects dibutyl tin dilaurate.
In the present invention, as a preference, crosslinking agent selects trimethylolpropane.
New infrared stimulates the preparation method of lower shape memory polyurethane material to include the following steps:
Step 1 carries out water removal drying to polytetramethylene ether diol, is weighed after water removal is dry, by polytetramethylene
35~50 parts and 120~250 parts of organic solvent of ether glycol are added in reactor, in the case where vacuum nitrogen protects atmosphere, several times
15~25 parts of 4,4 '-diphenylmethane diisocyanate is added, after stirring 30~60min, addition dibutyl tin dilaurate 0.05~
0.12 part, prepolymerization reaction is carried out, reaction temperature is 70~90 DEG C, and the reaction time is 1~2h, obtains performed polymer；
10~15 parts of Isosorbide-5-Nitrae butanediol are added in performed polymer by step 2, carry out chain extending reaction, and reaction temperature is 75~85
DEG C, mixing time is 2~3h, crosslinking agent is added,
The additional amount of crosslinking agent meets:
In above formula, M1For the mass fraction of polytetramethylene ether diol, M2For the mass fraction of diisocyanate, M3To expand
The mass fraction of chain agent, M4For the mass fraction of catalyst, M5For the mass fraction of organic solvent,For the basis of crosslinking agent
Mass fraction is 10 parts, and e is the natural logrithm truth of a matter,
Infrared stimulation is carried out using pulsed infrared laser light stimulator, is crosslinked, is obtained under pulsed infrared laser light stimulation
Reaction product；
Wherein, stimulation rates 20Hz, pulsewidth be 120 μ s, wavelength be 1.68 μm, pulsed infrared laser light stimulator it is specified
Power is 200mw/pulse, and pulsed infrared laser light stimulation time t is
Wherein, t0It is 1h, P for basic pulsed infrared laser light stimulation timewFor the stable state function of pulsed infrared laser light stimulator
Rate, PeFor the rated power of pulsed infrared laser light stimulator, ω is pulsewidth, ω0It is 100 μ s for basic pulsewidth.
After cooling down reactant, on a glass, curing is dried, drying temperature is 120~130 Celsius in step 3
Degree, drying time are 2~4 days.
Embodiment 1
To step 1, water removal drying is carried out to polytetramethylene ether diol, is weighed after water removal is dry, by poly- four methylene
35 parts and 120 parts of organic solvent of base ether glycol are added in reactor, and in the case where vacuum nitrogen protects atmosphere, 4,4 are added several times
15 parts of '-diphenylmethane diisocyanate, after stirring 30min, it is added 0.05 part of dibutyl tin dilaurate, carries out prepolymerization reaction, instead
Answering temperature is 70 DEG C, in the reaction time 1, obtains performed polymer；
10 parts of Isosorbide-5-Nitrae butanediol are added in performed polymer by step 2, carry out chain extending reaction, and reaction temperature is 75 DEG C, stirring
Time is 2h, and crosslinking agent is added,
The additional amount of crosslinking agent meets:
In above formula, M1For the mass fraction of polytetramethylene ether diol, M2For the mass fraction of diisocyanate, M3To expand
The mass fraction of chain agent, M4For the mass fraction of catalyst, M5For the mass fraction of organic solvent,For the basic matter of crosslinking agent
Number is measured, is 10 parts, e is the natural logrithm truth of a matter；
Infrared stimulation is carried out using pulsed infrared laser light stimulator, is crosslinked, is obtained under pulsed infrared laser light stimulation
Reaction product；
Wherein, stimulation rates 20Hz, pulsewidth be 120 μ s, wavelength be 1.68 μm, pulsed infrared laser light stimulator it is specified
Power is 200mw/pulse, and pulsed infrared laser light stimulation time t is
Wherein, t0It is 1h, P for basic pulsed infrared laser light stimulation timewFor the stable state function of pulsed infrared laser light stimulator
Rate, PeFor the rated power of pulsed infrared laser light stimulator, ω is pulsewidth, ω0It is 100 μ s for basic pulsewidth.
After cooling down reactant, on a glass, curing is dried in step 3, and drying temperature is 120 degrees Celsius, is done
The dry time is 2 days.
Embodiment 2
To step 1, water removal drying is carried out to polytetramethylene ether diol, is weighed after water removal is dry, by poly- four methylene
45 parts and 180 parts of organic solvent of base ether glycol are added in reactor, and in the case where vacuum nitrogen protects atmosphere, 4,4 are added several times
20 parts of '-diphenylmethane diisocyanate, after stirring 45min, it is added 0.08 part of dibutyl tin dilaurate, carries out prepolymerization reaction, instead
Answering temperature is 80 DEG C, in the reaction time 1.5, obtains performed polymer；
12.5 parts of Isosorbide-5-Nitrae butanediol are added in performed polymer by step 2, carry out chain extending reaction, and reaction temperature is 80 DEG C, stir
Mixing the time is 2.5h, and crosslinking agent is added,
The additional amount of crosslinking agent meets:
In above formula, M1For the mass fraction of polytetramethylene ether diol, M2For the mass fraction of diisocyanate, M3To expand
The mass fraction of chain agent, M4For the mass fraction of catalyst, M5For the mass fraction of organic solvent,For the basic matter of crosslinking agent
Number is measured, is 10 parts, e is the natural logrithm truth of a matter；
Infrared stimulation is carried out using pulsed infrared laser light stimulator, is crosslinked, is obtained under pulsed infrared laser light stimulation
Reaction product；
Wherein, stimulation rates 20Hz, pulsewidth be 120 μ s, wavelength be 1.68 μm, pulsed infrared laser light stimulator it is specified
Power is 200mw/pulse, and pulsed infrared laser light stimulation time t is
In above formula, t0It is 1h, P for basic pulsed infrared laser light stimulation timewFor the stable state of pulsed infrared laser light stimulator
Power, PeFor the rated power of pulsed infrared laser light stimulator, ω is pulsewidth, ω0It is 100 μ s for basic pulsewidth.
After cooling down reactant, on a glass, curing is dried, drying temperature is 125 DEG C, when dry in step 3
Between be 3 days.
Embodiment 3
To step 1, water removal drying is carried out to polytetramethylene ether diol, is weighed after water removal is dry, by poly- four methylene
50 parts and 250 parts of organic solvent of base ether glycol are added in reactor, and in the case where vacuum nitrogen protects atmosphere, 4,4 are added several times
25 parts of '-diphenylmethane diisocyanate, after stirring 60min, it is added 0.12 part of dibutyl tin dilaurate, carries out prepolymerization reaction, instead
Answering temperature is 90 DEG C, in the reaction time 2, obtains performed polymer；
15 parts of Isosorbide-5-Nitrae butanediol are added in performed polymer by step 2, carry out chain extending reaction, and reaction temperature is 85 DEG C, stirring
Time is 3h, and crosslinking agent is added,
The additional amount of crosslinking agent meets:
In above formula, M1For the mass fraction of polytetramethylene ether diol, M2For the mass fraction of diisocyanate, M3To expand
The mass fraction of chain agent, M4For the mass fraction of catalyst, M5For the mass fraction of organic solvent,For the basis of crosslinking agent
Mass fraction is 10 parts, and e is the natural logrithm truth of a matter；
Infrared stimulation is carried out using pulsed infrared laser light stimulator, is crosslinked, is obtained under pulsed infrared laser light stimulation
Reaction product；
Wherein, stimulation rates 20Hz, pulsewidth be 120 μ s, wavelength be 1.68 μm, pulsed infrared laser light stimulator it is specified
Power is 200mw/pulse, and pulsed infrared laser light stimulation time t is
In above formula, t0It is 1h, P for basic pulsed infrared laser light stimulation timewFor the stable state of pulsed infrared laser light stimulator
Power, PeFor the rated power of pulsed infrared laser light stimulator, ω is pulsewidth, ω0It is 100 μ s for basic pulsewidth.
After cooling down reactant, on a glass, curing, drying temperature 130, drying time is dried in step 3
It is 4 days.
Comparative example 1
Step 1 carries out water removal drying to polytetramethylene ether diol, is weighed after water removal is dry, by polytetramethylene
45 parts and 180 parts of organic solvent of ether glycol are added in reactor, and in the case where vacuum nitrogen protects atmosphere, 4,4 two are added several times
20 parts of phenylmethane diisocyanate, after stirring 45min, it is added 0.08 part of dibutyl tin dilaurate, carries out prepolymerization reaction, reaction
Temperature is 80 DEG C, in the reaction time 1.5, obtains performed polymer；
12.5 parts of Isosorbide-5-Nitrae butanediol are added in performed polymer by step 2, carry out chain extending reaction, and reaction temperature is 80 DEG C, stir
Mixing the time is 2.5h, and crosslinking agent is added and is crosslinked, reaction product is obtained；
The additional amount of crosslinking agent meets:
In above formula, M1For the mass fraction of polytetramethylene ether diol, M2For the mass fraction of diisocyanate, M3To expand
The mass fraction of chain agent, M4For the mass fraction of catalyst, M5For the mass fraction of organic solvent,For the basis of crosslinking agent
Mass fraction is 10 parts, and e is the natural logrithm truth of a matter；
After cooling down reactant, on a glass, curing is dried, drying temperature is 125 DEG C, when dry in step 3
Between be 3 days.
Comparative example 2
To step 1, water removal drying is carried out to polytetramethylene ether diol, is weighed after water removal is dry, by poly- four methylene
45 parts and 180 parts of organic solvent of base ether glycol are added in reactor, and in the case where vacuum nitrogen protects atmosphere, 4,4 are added several times
20 parts of '-diphenylmethane diisocyanate, after stirring 45min, it is added 0.08 part of dibutyl tin dilaurate, carries out prepolymerization reaction, instead
Answering temperature is 80 DEG C, in the reaction time 1.5, obtains performed polymer；
12.5 parts of Isosorbide-5-Nitrae butanediol are added in performed polymer by step 2, carry out chain extending reaction, and reaction temperature is 80 DEG C, stir
Mixing the time is 2.5h, is added 10 parts of crosslinking agent, infrared stimulation is carried out using pulsed infrared laser light stimulator, in pulsed infrared laser light
It is crosslinked under stimulation, obtains reaction product；
Wherein, stimulation rates 20Hz, pulsewidth be 120 μ s, wavelength be 1.68 μm, pulsed infrared laser light stimulator it is specified
Power is 200mw/pulse, and pulsed infrared laser light stimulation time t is
In formula, t0It is 1h, P for basic pulsed infrared laser light stimulation timewFor the stable state function of pulsed infrared laser light stimulator
Rate, PeFor the rated power of pulsed infrared laser light stimulator, ω is pulsewidth, ω0It is 100 μ s for basic pulsewidth.
After cooling down reactant, on a glass, curing is dried, drying temperature is 125 DEG C, when dry in step 3
Between be 3 days.
Comparative example 3
To step 1, water removal drying is carried out to polytetramethylene ether diol, is weighed after water removal is dry, by poly- four methylene
45 parts and 180 parts of organic solvent of base ether glycol are added in reactor, and in the case where vacuum nitrogen protects atmosphere, 4,4 are added several times
20 parts of '-diphenylmethane diisocyanate, after stirring 45min, it is added 0.08 part of dibutyl tin dilaurate, carries out prepolymerization reaction, instead
Answering temperature is 80 DEG C, in the reaction time 1.5, obtains performed polymer；
12.5 parts of Isosorbide-5-Nitrae butanediol are added in performed polymer by step 2, carry out chain extending reaction, and reaction temperature is 80 DEG C, stir
Mixing the time is 2.5h, is added 10 parts of crosslinking agent and is crosslinked, obtains reaction product；
After cooling down reactant, on a glass, curing is dried, drying temperature is 125 DEG C, when dry in step 3
Between be 3 days.
Shape memory polyurethane material obtained in embodiment 1-3 and comparative example 1-3 is tested, different works is applied
Firmly, the response rate of shape memory polyurethane material obtained in embodiment 1-3 and comparative example 1-3 is observed, as a result such as table 1
Table 1
As seen from the above table, the response rate of the shape memory polyurethane material of embodiment 1-3 is apparently higher than the shape of comparative example 1-3
Shape memory polyurethane material, in embodiment 1-3, by controlling the additional amount of crosslinking agent, before improving cross-linking reaction efficiency
Mentioning is the response rate for improving new infrared stimulation and descending shape memory polyurethane material, meanwhile, the synthesis of shape memory polyurethane
Cheng Zhong carries out infrared stimulation by pulsed infrared laser light stimulator in cross-linking reaction, and controls infrared stimulation time, makes to be crosslinked
It reacts and carries out more thorough rapidly, raising cross-linking reaction efficiency, and further enhance the lower shape memory polyurethane of new infrared stimulation
The response rate of material.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and embodiment shown and described herein.
Claims (8)
1. a kind of new infrared stimulates lower shape memory polyurethane material, which is characterized in that the new infrared stimulates lower shape
Memory polyurethane material is composed of the following parts by weight:
35~50 parts of polytetramethylene ether diol；
15~25 parts of diisocyanate；
10~15 parts of chain extender；
0.05~0.12 part of catalyst；
120~250 parts of organic solvent；
Crosslinking agent；
Wherein, the additional amount of crosslinking agent meets:
In above formula, M1For the mass fraction of polytetramethylene ether diol, M2For the mass fraction of diisocyanate, M3For chain extender
Mass fraction, M4For the mass fraction of catalyst, M5For the mass fraction of organic solvent,For the mass of foundation of crosslinking agent
Number, e are the natural logrithm truth of a matter.
2. new infrared according to claim 1 stimulates lower shape memory polyurethane material, which is characterized in that described two is different
Cyanate is 4,4 '-diphenylmethane diisocyanates.
3. new infrared according to claim 2 stimulates lower shape memory polyurethane material, which is characterized in that the chain extension
Agent is 1,4 butanediols.
4. new infrared according to claim 3 stimulates lower shape memory polyurethane material, which is characterized in that the catalysis
Agent is dibutyl tin dilaurate.
5. new infrared according to claim 1 or 4 stimulates lower shape memory polyurethane material, which is characterized in that described
Crosslinking agent is trimethylolpropane.
6. new infrared according to claim 5 stimulates lower shape memory polyurethane material, which is characterized in that described novel
The preparation method of shape memory polyurethane material includes the following steps: under infrared stimulation
Weighed polytetramethylene ether diol is added in step 1 in the reactor, vacuum nitrogen protect atmosphere under, several times plus
Enter weighed 4, weighed dibutyl tin dilaurate is added after stirring 30~60min in 4 '-diphenylmethane diisocyanates, carries out
Prepolymerization reaction, reaction temperature are 70~90 DEG C, and the reaction time is 1~2h, obtains performed polymer；
Weighed Isosorbide-5-Nitrae butanediol is added in performed polymer by step 2, carries out chain extending reaction, and reaction temperature is 75~85 DEG C, is stirred
Mixing the time is 2~3h, and crosslinking agent is added, and is crosslinked under pulsed infrared laser light stimulation, obtains reaction product；
After cooling down reactant, on a glass, curing is dried in step 3, and drying temperature is 120~130 degrees Celsius,
Drying time is 2~4 days.
7. new infrared according to claim 6 stimulates lower shape memory polyurethane material, which is characterized in that the step
In 2, pulsed infrared laser light stimulation time t is
Wherein, t0For basic pulsed infrared laser light stimulation time, PwFor the steady state power of pulsed infrared laser light stimulator, PeFor arteries and veins
The rated power of infrared laser stimulator is rushed, ω is pulsewidth, ω0For basic pulsewidth.
8. new infrared according to claim 1 or claim 7 stimulates lower shape memory polyurethane material, which is characterized in that described
The molecular weight of polytetramethylene ether diol is 2000~3500.
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| CN112521574A (en) * | 2020-12-07 | 2021-03-19 | 西安交通大学 | Intrinsic black polyurethane with near-infrared thermal effect and preparation and application thereof |
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