Star-shaped polymer with light/heat triple shape memory and preparation method thereof

A star-shaped polymer and polymer technology, applied in the field of polymer materials, can solve the problems of poor shape memory performance of shape memory polyurethane, single type of functional group, single function, etc., and achieve good crystal structure, good shape memory performance, and clear support. effect of structuring

CN110922561AActive Publication Date: 2020-03-27GUANGDONG UNIV OF PETROCHEMICAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-03-27

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Abstract

The invention provides a star-shaped polymer with optical / thermal triple shape memory. The structural formula of the star-shaped polymer is shown in the specification, the star-shaped polymer with optical / thermal triple shape memory prepared by the invention has a clear branched structure, and each unit volume has more functional groups, so that the star-shaped polymer has good shape memory performance.
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Description

technical field

[0001] The invention belongs to the technical field of polymer materials, and in particular relates to a star polymer with light / heat triple shape memory and a preparation method thereof. Background technique

[0002] Shape memory polymer, also known as shape memory polymer, refers to a product with an initial shape that changes its initial condition and fixes it under certain conditions, and is stimulated by external conditions (such as heat, electricity, light, chemical induction, etc.) , A polymer material that can restore its original shape.

[0003] Shape memory polymers have been widely studied as a class of smart materials due to their good shape memory fixation and recovery properties, especially multifunctional shape memory polyurethanes. However, most of the shape-memory polyurethanes currently studied are linear structures. During the cyclic thermomechanical analysis of this type of material, the deformation fixation rate and deformation recovery ...

Examples

Embodiment 1

[0030] A method for preparing a light / thermal triple shape memory star polymer, comprising the steps of:

[0031] (1) Weigh 4.8g SPCL (the molecular weight of SPCL is 5800) with an analytical balance, put it into a 250mL three-necked flask, and add an appropriate amount of DMF as a solvent in the flask, then drop two drops of DBTDI as a catalyst, install and stir Rod, the stirring speed is 300-400r / min, put the flask into an oil bath, seal and heat up to 70°C, absorb 0.45mL of HDI with a syringe, slowly drop into the three-necked flask, and react for 1.5h;

[0032] (2) Dissolve 1.15g of Azoba with an appropriate amount of DMF, slowly drop it into a three-necked flask, react for 6min, add 0.716mL of HDI again, and react for 4.2h;

[0033] (3) Add 0.4mL of HDI dropwise to the above liquid, react for another 20-30min, add 0.234g of BDO dropwise, react for 0.9h, and when the reaction is over, pour the liquid in the three-neck flask into the oven while it is hot. Spread the well-h...

Embodiment 2

[0035] A method for preparing a light / thermal triple shape memory star polymer, comprising the steps of:

[0036] (1) Weigh 5.1g SPCL (the molecular weight of SPCL is 5800) with an analytical balance, put it into a 250mL three-necked flask, and add an appropriate amount of DMF into the flask as a solvent, then drop two drops of DBTDI as a catalyst, install and stir Rod, the stirring speed is 300-400r / min, put the flask into an oil bath, seal and heat up to 80°C, absorb 0.5mL of HDI with a syringe, slowly drop into the three-necked flask, and react for 1.6h;

[0037] (2) Dissolve 0.92g of Azoba with an appropriate amount of DMF, slowly drop it into a three-necked flask, react for 4min, add 0.572mL of HDI again, and react for 3.8h;

[0038] (3) Add 0.5mL of HDI dropwise to the above liquid, react for another 20-30min, add 0.234g of BDO dropwise, react for 1.1h, and the reaction is over. Spread the well-heated petri dish into a moderately thick film, and place the petri dish in ...

Embodiment 3

[0040] A method for preparing a light / thermal triple shape memory star polymer, comprising the steps of:

[0041](1) Weigh 5g SPCL with an analytical balance (the molecular weight of SPCL is 5800), put it into a 250mL three-necked flask, and add an appropriate amount of DMF as a solvent in the flask, then drop two drops of DBTDI as a catalyst, and install a stirring bar , the stirring speed is 300-400r / min, put the flask into an oil bath, seal and heat up to 75°C, absorb 0.45mL of HDI with a syringe, slowly drop it into a three-necked flask, and react for 1.5h;

[0042] (2) Dissolve 0.767g of Azoba with an appropriate amount of DMF, slowly drop it into a three-necked flask, react for 5min, add 0.477mL of HDI again, and react for 4h;

[0043] (3) Add 0.45mL of HDI dropwise to the above liquid, react for another 20-30min, add 0.234g of BDO dropwise, react for 1h, and when the reaction is over, pour the liquid in the three-necked flask into the oven while it is hot and preheat it...