Preparation of single-site tin(IV) compounds and their use in the polymerization of ε-caprolactone

• Main Authors: Begum Canan Yildiz, Asgar Kayan
• Format: Article
• Language: English
• Published: Taylor & Francis Group 2017-01-01
• Series: Designed Monomers and Polymers
• Subjects: Single-site tin catalyst; carboxylates; ε-caplolactone; ring-opening; NMR
• Online Access: http://dx.doi.org/10.1080/15685551.2016.1231032

Butyltin(IV) carboxylate compounds were obtained by reactions of butyltrichlorotin(IV) with potassium pivalate, perfluoroheptanoate, methacrylate, 2,6-pyridinedicarboxylate, and phthalate. The synthesized complexes were fully characterized by nuclear magnetic resonance (1H-, 13C-NMR), Fourier transform infrared (FTIR), mass spectroscopies (MS) and elemental analysis. These tin complexes were used as catalysts for the ring opening polymerization of ε-caplolactone and the conversion of monomers to polymers was completed in just 1 h. The structures of polymers were characterized by a combination of spectroscopic techniques (NMR, FTIR, MS), differential scanning calorimeter (DSC) and gel permeation chromatography. In this study, the ε-caplolactone polymers with different average molecular weights between 5000 and 40,000 Da having a regular structure were obtained.