Poly(delta-gluconolactone) and Poly(delta-gluconolactone-ε-caprolactone) from delta-Gluconolactone and ε-Caprolactone by Ring-Opening Polymerization

Table 1

Catalysts, solvents and initiators were used for ROP of d-GL.

Entry	Solvent	Catalyst	Initiator	Result
(1)	THF	MBTO	Diethylene glycol	--
(2)	DMSO	MBTO	Diethylene glycol	---
(3)	CHCl3	MBTO	Diethylene glycol	---
(4)	n-Octane	MBTO	Diethylene glycol	Off-white
(5)	n-Octane	Sn(Oct)2	Diethylene glycol	---
(6)	n-Octane	TBT	Diethylene glycol	---
(7)	CL	MBTO	Diethylene glycol	---
(8)	Methylbenzene	MBTO	Diethylene glycol	Off-white
(9)	n-Octane	Y[N(SiMe3)2]3	Diethylene glycol	---
(10)	n-Octane	MBTO	---	Off-white
(11)	n-Octane	Al complexes	Diethylene glycol	---
(12)	Methylbenzene	MBTO	Benzyl alcohol	Off-white

-- reaction cannot carry out or cross-linking and gelation occur.