Effect of poly (methyl methacrylate)-grafted-talc content on mechanical properties and thermal degradation of poly (vinyl chloride) composites

Abstract

The influence of talc and poly (methyl methacrylate) (PMMA)-grafted (g)-talc on the mechanical properties of poly (vinyl chloride) (PVC) was investigated. The graft copolymerization was carried out under nitrogen atmosphere, using the free radical initiation technique. The blend formulations were first dry blended using a mixer before being milled into sheets on a two-roll mill at 165°C, and then hot pressed into composites at 190°C. The flexural modulus of both composites increased with increasing filler content from 0 to 20 part per hundred resin (phr), however the increment of grafted (57.7%) was higher than ungrafted composites (48.5%). A similar trend has also been observed for thermal stability. The impact strength of grafted was increased by 45.82%, whereas 18.96% in reduction was observed for the ungrafted composites. The decrement of flexural strength by 16.6% and 21.1% of grafted and ungrafted, respectively, has also shown the improvement in mechanical properties of grafted composites.

Surface modification of calcium carbonate by thiol‐ene click reaction and its effect on the performance of PVC composite

“…3,4 Therefore, inorganic fillers, such as CaCO 3 , kaolin, talc, and wollastonite, are often incorporated into PVC compositions. [5][6][7][8] CaCO 3 is the most extensively used inorganic filler, but it also presents challenges due to its hydrophilicity, incompatibility with the polymer matrix, and agglomeration tendencies. 9,10 Organic modification can enhance the compatibility of CaCO 3 with the polymer matrix and enable uniform dispersion.…”

“…A large amount of plasticizers is added to fabricate disposable PVC gloves, which can significantly impact the mechanical properties of these gloves 3,4 . Therefore, inorganic fillers, such as CaCO 3 , kaolin, talc, and wollastonite, are often incorporated into PVC compositions 5–8 . CaCO 3 is the most extensively used inorganic filler, but it also presents challenges due to its hydrophilicity, incompatibility with the polymer matrix, and agglomeration tendencies 9,10 .…”