Mechanical properties of glass bead‐ and wollastonite‐filled isotactic‐polypropylene composites modified with thermoplastic elastomers

Abstract

Mechanical properties of the isotactic-polypropylene/ glass bead (iPP/GB) and iPP/wollastonite (iPP/W) composites modified with thermoplastic elastomers, the poly(styrene-b-ethylene-co-butylene-b-styrene) copolymer (SEBS) and corresponding block copolymer grafted with maleic anhydride (SEBS-g-MA), were investigated. An increase in toughness of iPP with the elastomers was associated with a decrease in rigidity and strength. Mechanical performance of iPP increased more with acicular W than with spherical GB due to reinforcing effect of W. Comparing the (iPP/GB)/ SEBS and (iPP/W)/SEBS composites having the separate microstructure, strength and toughness values of the iPP/GB and iPP/W composites increased more with SEBS-g-MA at the expense of rigidity due to the coreshell microstructure with strong interfacial adhesion. Moreover, the iPP/W composite exhibited superior mechanical performance with 2.5 and 5 vol% of SEBSg-MA because of a positive synergy between the coreshell microstructure and reinforcing effect of acicular W. The extended models revealed that the elastomer and filler particles in the (iPP/GB)/SEBS and (iPP/W)/ SEBS composites acted individually due to the separate microstructure. However, the rigid GB and W particles encapsulated with the thick elastomer interlayer (R 0 /R 1 ¼ 0.91) in the (iPP/GB)/SEBS-g-MA and (iPP/W)/ SEBS-g-MA composites acted like neither big elastomer particles nor like individual rigid particles, inferring more complicated failure mechanisms in the core-shell composites. POLYM. COMPOS.

Polypropylene Filled With Glass Spheres in Extrusion‐Based Additive Manufacturing: Effect of Filler Size and Printing Chamber Temperature

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Optimization of mechanical properties of glass‐spheres‐filled polypropylene composites for extrusion‐based additive manufacturing

“…Previous studies by the authors showed that the stiffness of neat PP is sufficient for the use in FFF. As the incorporation of glass‐spheres in PP increases the Young's modulus , the stiffness requirement related to 3D‐printing is met by all filled composites of the present work. However, it was shown that only filled polypropylene compounds with a strength of minimum 13 MPa were successfully printable using a similar printing setup as described in “Impact Specimen Preparation” [2].…”

“…Their geometry allows good dispersion and a close packing, resulting in an improved dimensional stability for different thermoplastics . So far, many studies have been devoted to PP filled with the conventionally used inorganic soda lime glass, also known as A‐glass . Other glass types, such as the borosilicate glass (E‐glass), have established themselves as the filling material of choice for glass‐fiber reinforced composites , also in connection with PP .…”

Investigation on the mechanical and electrical properties of carbon nanotube/epoxy composites produced by resin transfer molding

“…By integrating the stress-strain curves in Figure 6(c), the toughness of material can be obtained. 36 It is 39.03 MJ/m 3 for composites, nearly 14 folds of the toughness (2.62 MJ/m 3 ) of pure epoxy resin, demonstrating that the composites have good balance of strength and ductility.…”