Mechanical properties, morphology, and crystallization behavior of polypropylene/elastomer/talc composites

Abstract

In this study, polypropylene/ethylene-octene copolymer (PP/POE) blends, PP/talc, and PP/POE/micro-talc (MT) composites were fabricated using a twin screw. To estimate the performances of the PP/POE blends, PP/talc, and PP/POE/MT composites, mechanical properties, heat deflection temperature (HDT), thermomechanical analysis, and isothermal crystallization characterization were conducted. Incorporating talc particles increased the tensile strength, flexural properties, and HDT of the PP matrix, but reduced the elongation at break and notched impact strength. The inclusion of POE elastomers in the PP matrix yielded the opposite effect on PP/talc composites. PP/POE/MT composites provide a compromise that improves both the flexural properties and notched impact strength. Moreover, the inclusion of talc particles in PP/POE blends induced heterogeneous nucleation and considerably reduced the crystallization time. Consequently, the time required for processing was also greatly reduced. POLYM. COMPOS.,

Effects of analcime zeolite synthesized from local pottery stone as nucleating agent on crystallization behaviors and mechanical properties of isotactic polypropylene

“…The degree of crystallinity ( χ c ) of iPP was determined from Eq . ; where Δ H c is the crystallization enthalpy of the tested sample and is the melting enthalpy of the 100% crystalline iPP with a value of 209 J/g and w is the weight fraction of iPP in the sample.…”

“…The iPP is one of the most important semicrystalline thermoplastics that is widely used in many areas such as automobile and textile industries, household appliance, construction, food packaging, and container owing to its versatility and useful properties with low cost, low density, nontoxicity, easy processing, and recyclability . However, iPP has relatively poor notched impact resistance, especially at low temperature, and thus its application as an engineering plastic is limited . This is because iPP is a crystallizable plastic that generally forms large crystallites during the crystallization process .…”

Study of the Technical Feasibility of the Use of Polypropylene Residue in Composites for Automotive Industry

“…Polypropylene (PP) is a recyclable thermoplastic, that is, it melts when heated and hardens again when cooled, in a reversible process. Moreover, PP is easily mixed, primarily with organic reinforcing loads such as natural or inorganic fibers, including calcium carbonate, clay and talcum, and is widely used in structural applications [39][40][41].…”

Influence of nucleation and growth mechanisms on the heat deflection temperature of a reactively processed polypropylene nanocomposite

“…However, a marginal improvement (1.7%) was noticed in the PP/LLDPE composite containing 10 wt.% talc and 10 wt.% magnesium carbonate. [ 12 ] A considerable improvement in HDT was also noticed in a PP/elastomer/talc composite, [ 13 ] where the concentrations of micron‐sized talc particles and the elastomer were maintained at 25% and 15%, respectively. Depending on the type of elastomer, HDT improved from 12% in neat PP to 18% in the PP/elastomer/talc composite.…”