2-ethylhexanoic acid tin(II) salt → HCID 131720449, compound

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Reaction Steps

The procedure described in Example 2 is substantially reproduced with 45.66 gm (0.40 mole) of ε-caprolactone, 63.84 gm (0.55 mole) of glycolide, 5.10 gm (0.05 mole) of p-dioxanone, 0.114 ml (1.20 mmole/mole of total monomer) of distilled diethylene glycol and 0.0673 ml stannous octoate (0.33 molar solution is toluene). A weight loss of 1.6% is observed when the polymer is devolatilized at 110° C. under high vacuum. The I.V. of the copolymer is 1.51 dl/g in HFIP and the mole ratio of PCL/PGA/PDS is found to be 38.5/56.2/5.4 by NMR. The glass transition temperature (Tg) and the melting point (Tm) of this copolymer are found to be -6° C. and 54° C., respectively, by DSC.

Provenance & Evidence