Polyhydroxy polyester and its preparation method
A polyhydroxy polyester and polyester technology, applied in the field of polyester, can solve the problems of strict polymerization conditions and high selectivity of polymerization monomers, and achieve the effect of improving hydrophilicity, weakening hydrophobicity, and being easy to hydrolyze
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[0054] The present invention also provides a preparation method of the polyhydroxy polyester described in the above technical scheme, comprising:
[0055] Step 1: mixing dibasic thiol, glycidyl methacrylate and end-capping group in a solvent to obtain a mixture;
[0056] Step 2: react the mixture obtained in step 1 with an organic base catalyst to obtain a polyhydroxy polyester.
[0057] According to the present invention, firstly, dibasic thiol, glycidyl methacrylate and end-capping group are mixed and dissolved in a reaction solvent and stirred evenly, and the molar ratio of end-capping group, dibasic thiol and glycidyl methacrylate is: (0~1.05):(20~21):(20~21). Described dibasic mercaptan preferably includes following four kinds:
[0058] a) alkane dithiols, the general formula is:
[0059]
[0060] Among them, p=2~10;
[0061] b) aromatic dithiols, with the general formula:
[0062]
[0063] c) polyethylene glycol dithiol, the general formula is:
[0064]
...
Embodiment 1
[0077] The preparation of embodiment 1 poly(ethanedithiol-co-glycidyl methacrylate)
[0078] According to the consumption of each raw material in table 1, prepare poly(ethanedithiol-co-glycidyl methacrylate) according to the following method:
[0079] Ethanedithiol, glycidyl methacrylate and tert-butyl methacrylate were added to the reaction flask according to the amounts in Table 1, dissolved with 30 ml of chloroform and stirred uniformly. Dissolve 0.162g of 1,8-diazabicyclo[5.4.0]undec-7-ene in 20ml of chloroform, slowly drop it into the reaction flask with stirring, and stir at 35°C for 6h to obtain The polymer was precipitated in ether, stirred for 5 hours to make the polymer adhere and precipitate, then dissolved with a small amount of chloroform, and repeated the precipitation and precipitation twice, and finally dried in a vacuum desiccator to obtain the target product.
[0080] The poly(ethanedithiol-co-glycidyl methacrylate) is tested by gel permeation chromatography...
Embodiment 2
[0088] The preparation of embodiment 2 poly(benzenedithiol-co-glycidyl methacrylate)
[0089] According to the consumption of each raw material in table 3, prepare poly(benzenedithiol-co-glycidyl methacrylate) according to the following method:
[0090] 1,4-benzenedithiol, glycidyl methacrylate and tert-butyl methacrylate were added to the reaction flask according to the amounts in Table 3, dissolved with 30 ml of chloroform and stirred uniformly. Dissolve 0.162g of 1,8-diazabicyclo[5.4.0]undec-7-ene in 20ml of chloroform, slowly add it dropwise to the reaction flask with stirring, and stir at 50°C for 2h to obtain The polymer was precipitated in ether, stirred for 5 hours to make the polymer adhere and precipitate, then dissolved with a small amount of chloroform, and repeated the precipitation and precipitation twice, and finally dried in a vacuum desiccator to obtain the target product.
[0091] The poly(benzenedithiol-co-glycidyl methacrylate) is tested by gel permeation ...
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