Use of ionic liquids based on phosphonium salts for preparing biocomposites by in situ polymerization

Abstract

A sodium montmorillonite, Dellite HPS, was modified with ionic liquids based on phosphonium salts, such as octadecyltriphenylphosphonium tetrafluoroborate and octadecyltriphenylphosphonium bromide. Thanks to their high thermal stability, these salts can be used during in situ polymerization, a method that favors the achievement of a good dispersion of the clay. Poly(1,4‐dimethylcyclohexane adipate) (PCHA), was chosen as an example of aliphatic polyester which can be a suitable matrix for new biocomposites with organo‐clays. The organo modified clays prepared were characterized by X‐ray diffraction (XRD), ATR‐FTIR spectroscopy, and thermal gravimetric analysis (TGA) while biocomposites were analyzed in terms of molecular structure, thermal and thermomechanical properties. The degree of dispersion of the clays in the polymer matrix was studied by XRD. The results show that the clays are well dispersed in the biocomposites, despite an intercalated structure highlighted by XRD analysis. Moreover, the clays confer a certain improvement in mechanical properties to the final materials. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42467.

Bio-Based Furan-Polyesters/Graphene Nanocomposites Prepared by In Situ Polymerization

“…The polycondensation procedure was described in previous papers [ 11 , 44 , 45 ]. 28.1 g (0.180 mol) of FDCA, 24.6 g (0.324 mol) of PD and 320 mg (1.1 10 −3 mol) of Sb 2 O 3 corresponding to 1 wt % respect to the theoretical final polymer, were charged into a glass reactor (250 mL capacity).…”

Olive Mill Wastewater Valorization in Multifunctional Biopolymer Composites for Antibacterial Packaging Application

“…Bionanocomposites with 5 wt% loading of the organo-modified LDHs were prepared by in situ polymerization following a common procedure already reported [30]. As an example, the procedure for preparing PBS:Zn 2 Al/VA was as follows: a round-bottomed, wide-neck glass reactor (250-mL capacity) was loaded with BD (29.6 g, 328 mmol), TBT (0.0585 g, 0.172 mmol), and 2.35 g of Zn 2 Al/VA (previously dried overnight at 105 °C), corresponding to 5 wt% with respect to the polymer theoretical yield.…”

Chain extender effect of 3-(4-hydroxyphenyl)propionic acid/layered double hydroxide in biopolyesters containing the succinate moiety

“…PBSA is a copolymer of PBS containing a potentially biobased comonomer: dimethyladipate. 30 In this work, the molar feed ratio between succinate and adipate is 80/20, because it was reported that this composition guarantees the best balance between biodegradation rate and thermomechanical properties. 23 As compared to PBS, PBSA is more susceptible to biodegradation because of its lower crystallinity and higher flexibility of the polymer chains.…”