Polymer with triple shape memory effect and preparation method of polymer
A memory effect and polymer technology, applied in the field of polymers with triple shape memory effects and their preparation, can solve the problems of limiting the range of triple shape memory polymers, and achieve the effects of wide selection of raw materials, easy processing, and simple preparation methods
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Embodiment 1
[0016] A polymer with triple shape memory effect in this embodiment uses the following raw materials: polyethylene glycol diacrylate (PEGDA): average molecular weight 6000g / mol, purchased from Sigma-aldrich company; cyclohexyl methacrylate (CMA ), ethyl methacrylate (EMA): purchased from Sigma-Aldrich; benzoyl peroxide (BPO), purchased from Aladdin Reagents (Shanghai) Co., Ltd.;
[0017] The preparation method of this example is: prepare by solvent-free bulk polymerization, weigh a certain amount of polyethylene glycol diacrylate (PEGDA), cyclohexyl methacrylate (CMA), ethyl methacrylate (EMA) ( Among them, the mass ratio of PEGDA / CMA / EMA is 3:1:1), add benzoyl peroxide (the amount added is 2.5% of the total mass of the system), dissolve it at 75°C, stir well and pour it into a sealed glass In the tank, cure at 100°C for 2 to 3 hours. The obtained polymer is a cross-linked network structure with a crystalline melting temperature (low temperature phase) and a glass transition ...
Embodiment 2
[0021] A polymer with a triple shape memory effect in this embodiment uses the following raw materials: polyethylene glycol diacrylate (PEGDA): average molecular weight 8000g / mol, purchased from Alfa Aesar; methyl acrylate (MA), methyl n-Butyl acrylate (n-BMA), methyl methacrylate (MMA): purchased from Sigma-Aldrich; azobisisobutyronitrile (AIBN), purchased from Aladdin Reagents (Shanghai) Co., Ltd.;
[0022] The preparation method of this example is: prepare by solvent-free bulk polymerization, weigh a certain amount of polyethylene glycol diacrylate and methyl acrylate (MA), n-butyl methacrylate (n-BMA), methacrylic acid Methyl ester (MMA) (the mass ratio of PEGDA / MA / n-BMA / MMA is 5:2:2:0.5), add benzoyl peroxide (the addition amount is 2.5% of the total mass of the system), and add Dissolve at 75°C, stir evenly, pour into a sealed glass tank, and cure at 100°C for 2 to 3 hours. The obtained polymer is a cross-linked network structure with a glass transition temperature (low...
Embodiment 3
[0026] A polymer with triple shape memory effect in this embodiment uses the following raw materials: polycaprolactone diacrylate (PCLDA): average molecular weight 4000g / mol, purchased from Alfa Aesar; dimethylaminoethyl methacrylate (DMAEMA), isobornyl methacrylate (IBOMA), methacrylic acid (MAA), tricyclodecane dimethanol diacrylate (TDD): purchased from Sigma-Aldrich; dicumyl peroxide (DCP) , purchased from Aladdin Reagent (Shanghai) Co., Ltd.;
[0027] The preparation method of this example is: prepare by solvent-free bulk polymerization, weigh a certain amount of polycaprolactone diacrylate, dimethylaminoethyl methacrylate (DMAEMA), isobornyl methacrylate (IBOMA) , methacrylic acid (MAA), tricyclodecane dimethanol diacrylate (TDD) (the mass ratio of PCLDA / DMAEMA / IBOMA / MAA / TDD is 12:5:0.5:0.5:1), adding benzene peroxide Formyl (the amount added is 2.5% of the total mass of the system), dissolved at 75°C, stirred evenly, poured into a sealed glass tank, and cured at 100°C ...
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