Preparation method of polyfurandioctyl phthalate glycol ester
A technology of polyethylene furandicarboxylate and ethylene furandicarboxylate, which is applied in the field of bio-based polyester synthesis, can solve problems such as high molecular weight and color, and achieve improved product color, increased molecular weight, The effect of excellent mechanical properties
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[0040] Example 1:
[0041] (1) Add dimethyl furandicarboxylate (0.1mol, 18.4g), ethylene glycol (0.25mol, 15.5g) and 1,8-diazabicycloundec-7-ene (0.1mmol, 20.7 mg), react at 170°C for 1 hour, react at 180°C for 1 hour, and react at 190°C for 2 hours to obtain transesterified products;
[0042] (2) Melt polycondensation at 250° C. and 150 Pa for 5 hours to prepare polyethylene furandicarboxylate PEF1.
[0043] After testing, the intrinsic viscosity of PEF1 is 0.83dL / g; the absorbance at 400nm is 0.05.
Example Embodiment
[0044] Example 2:
[0045] (1) Add dimethyl furandicarboxylate (0.1mol, 18.4g), ethylene glycol (0.25mol, 15.5g) and 1,8-diazabicycloundec-7-ene in coordination with the supported catalyst ( 0.1mmol, 16.8mg), reacted at 170°C for 1 hour, 180°C for 1 hour, and 190°C for 1 hour to obtain the transesterified product;
[0046] (2) Melt polycondensation at 240° C. and 150 Pa for 3 hours to prepare polyethylene furandicarboxylate PEF2.
[0047] After testing, the intrinsic viscosity of PEF2 is 0.96dL / g; the absorbance at 400nm is 0.03.
[0048] The preparation of the 1,8-diazabicycloundec-7-ene complex supported catalyst includes the following steps:
[0049] (I) Take 10ml of n-butyl titanate and mix it in 100ml of hydrochloric acid with a concentration of 1mol / L, and stir for 5h to obtain TiO 2 Sol
[0050] (Ⅱ) In the above TiO 2 Add 4.5g of talc and 10g of 1,8-diazabicycloundec-7-ene to the sol. After stirring for 3 hours, filter and centrifuge to obtain a white precipitate. After washing w...
Example Embodiment
[0052] Example 3:
[0053] (1) Add dimethyl furandicarboxylate (0.1mol, 18.4g), ethylene glycol (0.25mol, 15.5g) and polyvinylpyrrolidone with a supported catalyst (0.1mmol, 20.9mg), and react at 170°C for 1h, React at 180°C for 1 hour and at 190°C for 0.5 hour to obtain transesterified products;
[0054] (2) Melt polycondensation at 250° C. and 200 Pa for 2 hours to prepare polyethylene furandicarboxylate PEF4.
[0055] After testing, the intrinsic viscosity of PEF4 is 1.35dL / g; the absorbance at 400nm is 0.02; the mechanical properties of PEF4 are shown in the figure figure 1 Shown.
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