A kind of synthetic method of self-plasticized modified polycaprolactone
A technology of polycaprolactone and a synthesis method, which is applied in the synthesis field of modified polycaprolactone, can solve the problems of low strength, limited application and the like, and achieve the effect of improving plasticization rigidity
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Embodiment 1
[0015] Mix 27g of polycaprolactone (mole number: 0.05; OH mole number: 0.15) with trihydroxy functional group molecular weight 540 and 29.1g toluene-2,4-diisocyanate (mole number: 0.15; NCO mole number: 0.300) , After stirring the reaction at 80-100°C, lower it to 60°C, add 6.5g of isooctyl alcohol (0.05 moles), stir and react at 60°C for 240 minutes, raise the temperature to 100°C, until there is basically no isooctyl alcohol vapor, and the fluidity is very good , basically no bubbles, the solution is clear and transparent, pump air until the solution has no bubbles, stop heating, let stand, and you are ready. Observed overnight, it was found that the solution was uniform and stable, flowing slowly at room temperature, and had good fluidity when heated to 80°C.
Embodiment 2
[0017] Mix 73.03g of polycaprolactone (mole number: 0.1352; OH mole number: 0.4057) with trihydroxy functional group molecular weight of 540 and 68.16g hexamethylene diisocyanate (mole number: 0.4057; NCO mole number: 0.8114), After stirring and reacting at 80-100°C for 3 hours, lower it to 25°C, add 17.58g of isooctyl alcohol (mole number: 0.1352), and stir at room temperature for 0.5h. The solution is colorless and transparent, relatively viscous, and turns white after stirring. .
[0018] At this time, raise the temperature to 110°C and stir for 1.5h to react, continue to add 39.69g of hexamethylene diisocyanate (moles: 0.2363, NCO moles: 0.4725), and stir at 100°C for 30mins until the solution is clear, free of alcohol vapor, and free of bubbles After that, let it stand still, and you will get it. Observed at 100°C, the fluidity of the solution is good, the bubbles disappear, and the solution changes from white to clear
Embodiment 3
[0020] Mix 13.5g of polycaprolactone (mol number: 0.025; OH mole number: 0.075) with trihydroxy functional group molecular weight of 540 and 12.6g hexamethylene diisocyanate (mol number: 0.075; NCO mole number: 0.15), After stirring and reacting at 100°C for 3 hours, lower it to 25°C, add 3.25g of isooctyl alcohol (mole number: 0.025), and stir at room temperature for 0.5h. The solution is colorless and transparent, relatively viscous, and turns white with many bubbles after stirring.
[0021] At this point, raise the temperature to 100°C and stir for 1.5h to react, then continue to add 5.18g of hexamethylene diisocyanate (moles: 0.03083, NCO moles: 0.06167), and stir at 100°C for 20min until the solution is clear, free of alcohol vapor and bubbles After that, let it stand still, and you will get it. Observed at 100°C, the fluidity of the solution was good, the bubbles disappeared, and the solution changed from white to clear.
[0022] Effect experiment example
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