تفاعل #1580053

معادلة التفاعل

l-lactide

1,3-dioxan-2-one

Trimethylene carbonate

diethylene glycol

Dabco

→

L-Lactide Trimethylene Carbonate

ظروف التفاعل

المعالجة

1. 1
   أخرى, hereafter abbreviated T-9) (1.35×10-2 g, 3.3×10-5 moles) were combined in a stirred reactor at 182° C
2. 2
   workup.ADDITIONwas added
3. 3
   درجة الحرارةthe temperature was increased to 200° C
4. 4
   workup.WAITAfter 45 minutes

الإجراء التجريبي

Polymerization grade 1,3-dioxan-2-one (trimethylene carbonate, hereafter abbreviated TMC) (97.5 g, 0.995 mole), diethylene glycol (hereafter abbreviated DEG) (4.20×10-2 g, 4.0×10-4 mole), and Dabco T-9 catalyst (a stannous 2-ethylhexanoate catalyst formulation sold by Air Products, Inc., hereafter abbreviated T-9) (1.35×10-2 g, 3.3×10-5 moles) were combined in a stirred reactor at 182° C. The temperature was raised to 188° C. and the mixture was stirred for 11/2 hours at this temperature. Polymerization grade l-lactide (52.5 g, 0.364 mole) was added and the temperature was increased to 200° C. After 45 minutes, the polymer was discharged from the reactor and allowed to solidify.

المصدر