Biodegradability of poly(vinyl acetate) containing a pyridinium group

Abstract

SYNOPSISAn attempt has been made to give biodegradability to poly(viny1 acetate) by partial modification of the chemical structure. Poly(viny1 acetate) containing a small amount of Nbenzyl-4-vinylpyridinium chloride (PVAc-co-VPC) and that containing 16 mol % of methyl acrylate and a small amount of the pyridinium group (PVAc-co-MA-co-VPC) showed significant degradation when placed in an aeration tank of sewage works. Control polymers possessed of no pyridinium group did not show significant degradation under these conditions, and the extent of weight reduction during the treatment increased with the content of the pyridinium group. The weight reduction exhibited an uppermost limit after 7 days of the treatment, and the pyridinium group disappeared from the polymer during the early period. Incorporation of the pyridinium group into poly(viny1 acetate) appeared to have improved the biodegradability. Gel permeation chromatographic analysis showed that the low molecular weight fraction was more easily degraded than was the high molecular weight fraction. In the degradation of PVAc-co-MA-co-VPC, the unit of methyl acrylate was more easily removed than that of vinyl acetate. 0 1995 John Wiley & Sons, Inc.

Syntheses of biodegradable vinyl polymers by insertion of N-benzyl-4-vinylpyridinium chloride into the main chain

“…Attempts were made to prepare biodegradable poly(vinyl acetate) by insertion of BVP into the main chain [28]. Unexpectedly, however, a difficult problem was observed in this case.…”

Strong biodegradability of vinyl polymers exerted by insertion of N-benzyl-4-vinyl-pyridinium halide into the main chain

“…We investigated biodegradation of copolymer of vinyl acetate with BVP(Cl), PVAC-co-BVP(Cl), by placing in aeration tank of sewage work [32]. Polymer samples were prepared as films of 2.5 cm wide, 3.5 cm long and 0.5 mm thick.…”

Basalt-Fiber-Reinforced Polyvinyl Acetate Resin: A Coating for Ductile Plywood Panels

“…The advantages of PVAC adhesive over epoxy resin are its lower price, faster solidification, easy handling and cleaning, and its less negative impact on the environment [8]. Moreover, PVAC is degradable, and some types are even biodegradable [9,10]. Still, epoxy resin has a higher modulus of elasticity and better water resistance [11]; thus, application of PVAC will not necessarily increase stiffness.…”