تفاعل #2307176

معادلة التفاعل

l-lactide

trimethylene carbonate

1,3-propanediol

→

l-Lactide Trimethylene Carbonate

ظروف التفاعل

المعالجة

1. 1
   أخرىThe copolymer (Co—P4) was prepared
2. 2
   أخرىThe polymer was isolated
3. 3
   أخرىground, dried
4. 4
   درجة الحرارةheated above 80° C. under reduced pressure
5. 5
   أخرىto remove residual monomer
6. 6
   أخرىa Tm=166° C. and Mw=160 kDa
7. 7
   أخرىat 180° C.

الإجراء التجريبي

The copolymer (Co—P4) was prepared following the teaching of U.S. Pat. No. 6,342,065 by the two-step copolymerization of l-lactide with trimethylene carbonate in the presence of 1,3-propanediol and stannous octanoate as the initiator and catalyst, respectively. The polymer was isolated, ground, dried, and heated above 80° C. under reduced pressure to remove residual monomer. The polymer was characterized for identity (IR), thermal properties (DSC), and molecular weight by GPC (CH2Cl2). The polymer was shown to have a Tm=166° C. and Mw=160 kDa. The copolymer was then compression molded into a 0.1 mm-thick film at 180° C.

المصدر