Effect of poly(ethylene methyl acrylate) copolymer on thermal, morphological, and mechanical properties of polypropylene copolymer blown films

Abstract

Blends of polypropylene copolymer (PP-cp) and poly(ethylene methyl acrylate) [poly(EMA)] copolymer blends were processed by blown film extrusion. The orientation and crystallinity of PP-cp matrix in the blend did not change significantly with the addition of EMA. The low machine direction and transverse direction tear strengths, which are observed for neat polypropylene blown films more than doubled at 6 wt % or higher content of EMA. The increase in tear properties was mainly attributed to a fine dispersion of EMA in the matrix with an average particle size of 100-500 nm and the formation of elongated domains. The dispersed nonrounded EMA domains, resulting from the blown-film process, enhance better energy dissipation mechanism with the formation of an extended plastic zone in the blend films as compared with that in pure PP-cp films.

Rheological, Morphological and Mechanical Characterization of Recycled Poly (Ethylene Terephthalate) Blends and Composites

“…The addition of elastomeric particles finely dispersed into thermoplastic matrices such as PET has succeeded in improving the ability of these materials to absorb mechanical energy 8 . Poly (ethylene-methyl acrylate) (EMA) is available with 5-35 wt% of methyl acrylate comonomer, with characteristics ranging from a thermoplastic response to the low methyl acrylate content, to a rubbery behavior with higher methyl acrylate contents 9 . The behavior of stress-strain curves for EMA is similar to that of elastomeric polymers.…”

Peel/seal properties of poly(ethylene methyl acrylate)/polybutene-1 blend films

“…Methyl acrylate (MA) is a polar group in EMA resin and brings many properties such as rubbery behavior. The higher the MA group, the higher the rubbery behavior, the higher the tear resistance and the lower the crystallinity of the EMA resin [6][7][8]. In this study, the effect of MA content on the peel/seal properties (i.e.…”

Supramolecular structures and dyeing properties of poly(ethylene terephthalate) industrial yarns for seat‐belt webbings

“…In the case of sample Hig‐2, a low molecular copolymer was added (<5 wt% over PET) to the polymer dope during the spinning process to improve its spinnability and mechanical properties. The additive is a low molecular weight acrylic copolymer that is designed to enhance the mobility between the polymer chains of PET without chemical reaction [9].…”

“…In addition, the slightly lower exhaustion (%) of Reg-2 compared with Reg-1, and that of Hig-1 compared with Hig-2, could be inferred from the relatively lower I. Sax values. In the case of the 'higher' samples, the addition of low molecular copolymer into the fibre induced the high adsorption of dye particles because of the low melting point of the additive [9]. Therefore, the trends of the exhaustion behaviours are closely related to the degree of alignment of the amorphous chains (based on the I. Sax) and the overall orientation of polymer chains (birefringence) rather than the crystallinity.…”