The effect of lanthanum trimethacrylate on the mechanical properties and flame retardancy of dynamically vulcanized PP/EPDM thermoplastic vulcanizates

Abstract

A new kind of polypropylene/ethylene-propylene-diene monomer (PP/EPDM) thermoplastic elastomer (TPE) with good mechanical properties and flame retardancy was prepared via in situ peroxide-induced dynamic vulcanization using lanthanum trimethacrylate (LaTMA) as a reinforcing agent. The morphology, structure, and mechanical properties and reinforcement mechanism of PP/EPDM/LaTMA TPE were investigated by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, rubber process analyzer, cross-link density test, and so on. The flame retardancy was investigated by limiting oxygen index (LOI) test. The results showed that when the amount of lanthanum oxide was 4.96 phr and methyl methacrylate was 7.85 phr, the compatibility between EPDM and PP was greatly improved. Besides, the tensile strength, tear strength, elongation at break, and hardness (shore A) of PP/EPDM/LaTMA TPE were increased from 6.2 MPa, 41.7 kN m À1 , 148%, and 81 up to 11.1 MPa, 77.3 kN m À1 , 365%, and 89, respectively. And the LOI of PP/EPDM/LaTMA TPE was increased to 19.0%. The SEM images, the higher G 0 , and the ionic cross-link suggested that a strong filler-filler network was formed by the polymerization and the grafted of LaTMA in the PP and EPDM phase which enhanced the compatibility between PP and EPDM. The DSC and FTIR results further proved that during the processing.

Effect of zinc dimethacrylate concentrations on properties of emulsion styrene butadiene rubber/butadiene rubber blends

“…The swollen samples were wiped with tissue paper to remove excessive toluene and weighed immediately. Lastly, the swollen samples were dried at 60°C until they achieved constant weight [10, 11].…”

Effects of graphene network formation and its correlation with microstructure and mechanical properties in dynamically vulcanized PP/EPDM composites reinforced with few‐layer graphene

“…As a result of ascending usage of TPVs in different applications, realizing their mechanical behavior becomes more substantial and challenging. [1][2][3][4][5][6][7][8][9] The addition of nanofillers into PP/EPDM composite can enhance the properties such as modulus, strength and stiffness. In addition to mechanical properties, an enhancement in preferable characteristics like barrier, thermal, flame retardancy and electrical properties is achieved.…”

“…In recent years, thermoplastic vulcanizes (TPVs) blends of polypropylene (PP) and ethylene propylene diene monomer (EPDM) have always been as one of the most extensively used in industrial applications such as building, industrial market, automobile and aviation industry due to superior mechanical properties, high fracture toughness behavior, simple processability and low cost. As a result of ascending usage of TPVs in different applications, realizing their mechanical behavior becomes more substantial and challenging 1–9 . The addition of nanofillers into PP/EPDM composite can enhance the properties such as modulus, strength and stiffness.…”

Effects of Dynamic Crosslinking on Crystallization, Structure and Mechanical Property of Ethylene-Octene Elastomer/EPDM Blends

“…One aspect is that POE, like EPDM, can also be crosslinked, whereas PP cannot [ 19 ]. Another aspect is that POE/EPDM is more compatible than PP/EPDM blends [ 17 , 20 ]. Therefore, a POE/EPDM blend using the dynamic crosslinking method is not a typical TPV.…”