Synthesis of a new compatibilisant agent PVC‐g‐MA and its use in the PVC/alfa composites

Abstract

ABSTRACT:The main objective of this research was to synthesize a new compatibilisant agent (PVC-g-MA), which was grafted from the maleic anhydride on the PVC chains. The presence of maleic anhydride grafting on PVC was made evident by infrared analysis. PVC-g-MA was used like compatibilisant to solve the problem of the incompatibility between the hydrophobic polymeric matrix (PVC) and hydrophilic fiber (alfa). Composites samples were prepared with different alfa fiber loading (10, 20, and 30 wt %) and incorporating PVC-g-MA (1, 3, and 5 wt %) or PP-g-MA (3 wt %). The tensile properties, the thermal stability and the morphology of the composites were investigated. The result indicated that the PVC-g-MA increased the interfacial adhesion between the fibers and the polymer matrix and this effect was better than that obtained for the maleated-polypropylene-coupled composites. Microstructure analysis of the fractured surfaces of MAPP modified composites confirmed improved interfacial bonding. The addition of alfa and PVC-g-MA increased the thermal stability of the composites. The temperature of degradation of the polymer matrix increased about 16 C in comparison to the noncoupled composite, indicating that PVC-g-MA improved the thermal stability of the polymer.

Effect of chemical treatment on newspaper fibers reinforced polymer poly(vinyl chloride) composites

“…Sreenivasan et al reported that the permanganate treatment on sansevieria cylindrica fibers increased the percentage of crystallinity index. Hammiche et al studied the effect of poly(viny lchloride)‐grafted‐maleic anhydride PVC‐g‐MA (1, 3, and 5%) on PVC/alfa fiber. They have found that the tensile strength of the composites with PVC‐g‐MA was higher than that of the untreated composites.…”

Number of processing cycle effect on the properties of the composites based on alfa fiber

“…18 Hydrophilic character of natural fibers leads to poor resistance to moisture and low interfacial properties between fiber and polymer matrix, which reduces their potential as reinforcing agents.…”

Sodium dodecyl sulfate (SDS) as a filler treatment: effects on mechanical, morphological and swelling properties of poly (vinyl chloride) (PVC)/epoxidized natural rubber (ENR)/kenaf core powder composites

“…physical or chemical) and others were based on the addition of a coupling agent (or compatibilizer) for interfacial adhesion improvement. 14 For fibre modification, researchers studied types of chemical treatment of natural fibre, in order to improve the compatibility between both components. Chemicals may activate hydroxyl groups or introduce new moieties that can effectively interlock with the matrix.…”

“…Hemi-cellulose is strongly bound to cellulose fibrils presumably by hydrogen bonds. 1,[13][14][15][16][17][18] The abundance of hydroxyl groups in natural fibre makes it incompatible with the hydrocarbon plastic material. Furthermore, the presence of impurities in the outer layer of natural fibre makes it more difficult to interact with the hydrocarbon plastic material.…”