Reactive compatibilization of PC/PVDF polymer blends by zinc carboxylate containing poly(methylmethacrylate) ionomers

Abstract

Polycarbonate (PC) has been reacted with a random copolymer of methylmethacrylate and 6 mol% of acrylic acid (poly(MMA-co-AA)) and with this copolymer neutralized (totally or not) by Zn cations. When conducted in solution at 240°C, the reaction leads to the grafting of PC onto the copolymer neutralized or not. In the melt at 235°C, the grafting reaction occurs only when the copolymer is at least partly neutralized. Whatever the experimental conditions (solution or bulk), PMMA does not react with PC, which confirms that the acidolysis of PC is at the origin of the grafting reaction.Poly(vinylidene fluoride) (PVDF) and PC have been melt blended at 235°C in the presence of the poly(MMAco-AA) copolymer totally neutralized or not by Zn cations, the purpose being the reactive formation of PMMAg-PC copolymer that would act as compatibilizer for the PC/PVDF blend. The phase morphology and the mechanical properties of the compatibilized PC/PVDF blends have been compared with the parent non-reactive polyblends. Compared to the modification of PVDF by 20 wt% of PMMA, the use of 20 wt% of the partly neutralized poly(MMA-co-AA) copolymer decreases further the average size of the dispersed phase, enhances its adhesion to the matrix, and results in a considerable increase of the elongation at break. The beneficial effect of zinc carboxylate in the PMMA copolymer is explained by the grafting of PC onto PMMA at the interface.

Preparation, Thermal, and Thermo-Mechanical Characterization of Polymeric Blends Based on Di(meth)acrylate Monomers

“…In another study, imide units were copolymerized with MMA in order to improve the compatibility between PC and acrylics through specific interactions or internal repulsion [ 20 ]. Moussaif et al obtained a PMMA-g-PC copolymer that could act as a compatibilizer for the PC/PVDF blend [ 21 ]. Kunar et al melt blended bisphenol-A polycarbonate and poly(butylene terephthalate) with ethylene-n-butylacrylate-glycidylmethacrylate terpolymer at various proportions in order to study the effects of compatibilizers on mechanical, thermal, and flow properties of the blends [ 22 ].…”

Amphiphilic ABA‐type triblock copolymers for the development of high‐performance poly(vinylidene fluoride)/poly(vinyl pyrrolidone) blend ultrafiltration membranes for oil separation

“…A membrane with a 50% weight ratio of PMMA and PVDF exhibited a lower contact angle than the neat PVDF membrane. A PVDF–polycarbonate blend membrane having a PMMA compatibilizer was reported to have enhanced miscibility and mechanical properties.…”

Counterion dependent crystallization kinetics in blends of a perfluorosulfonate ionomer with poly(vinylidene fluoride)

“…In an attempt to utilize the tendency of PVDF to interact with polar polymers, several blend compatibility studies have been reported for blends of PVDF with a variety of ion-containing polymers [14]. Moussaif et al investigated the miscibility of PVDF with poly(methyl methacrylate-co-zinc acrylate) ionomers [15] and polycarbonate grafted with poly(methyl methacrylate-co-zinc acrylate) [16]. These studies showed an increasing tendency toward miscibility with an increase in the ionic functionality of the ionomer.…”