Polymer Networks Synthesized from Poly(Sorbitol Adipate) and Functionalized Poly(Ethylene Glycol).

Polymer networks were prepared by Steglich esterification using poly(sorbitol adipate) (PSA) and poly(sorbitol adipate)--poly(ethylene glycol) mono methyl ether (PSA--mPEG) copolymer. Utilizing multi-hydroxyl functionalities of PSA, poly(ethylene glycol) (PEG) was first grafted onto a PSA backbone. Then the cross-linking of PSA or PSA--mPEG was carried out with disuccinyl PEG of different molar masses (Suc-PEG-Suc).

Multiple grafting to enzymatically synthesized polyesters.

Enzymatic polymerization is an environmentally benign process for the synthesis of biodegradable and biocompatible polymers. The regioselectivity of lipase B from Candida Antarctica (CAL-B) produces linear functional polyesters without protection-deprotection steps. In this work, two different methods for the enzymatic synthesis of functional polyesters based on renewable resources, as, e.

Enzymatic Synthesis and Characterization of Hydrophilic Sugar Based Polyesters and Their Modification with Stearic Acid.

Biodegradable and hydrophilic functional polyesters were synthesized enzymatically using xylitol or d-sorbitol together with divinyl adipate and lipase B from (CAL-B). The resulting polyesters had pendant OH-groups from their sugar units which were esterified to different degrees with stearic acid chloride. The structure and the degrees of polymerization of the resulting graft copolymers based on poly(xylitol adipate) and poly(d-sorbitol adipate) were characterized by ¹H NMR spectroscopy and SEC.

2-(3-Methyl-but-2-en-1-yl)-1,2-benziso-thia-zol-3(2H)-one 1,1-dioxide.

In the title compound, C(12)H(13)NO(3)S, a saccharin derivative, the dihedral angle between the aromatic and isothia-zole rings is 2.91 (12)°. The planar 3,3-dimethyl-allyl group [maximum deviation = 0.