Thermal properties of polypropylene and polyethylene blends (PP/LDPE)

Shafigullin, L. N.; Romanova, Natalya V.; Gumerov, I. F.; Gabrakhmanov, A T; Sarimov, D R

doi:10.1088/1757-899x/412/1/012070

Cited by 16 publications

(13 citation statements)

References 4 publications

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“…The temperature position of T max2 is typical for polyolefins [ 67 ]. According to the literature reports, the decomposition of polyolefins occurs between 300 and 500 °C, with the fastest rate around 440–460 °C for PP and 460–475 °C for polyethylene [ 68 , 69 , 70 , 71 ]. Generally, the polyolefins are completely degrading, with the residue usually lower than 1.0 wt % [ 68 ].…”

Section: Resultsmentioning

confidence: 99%

Wastes from Agricultural Silage Film Recycling Line as a Potential Polymer Materials

et al. 2021

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The recycling of plastics is currently one of the most significant industrial challenges. Due to the enormous amounts of plastic wastes generated by various industry branches, it is essential to look for potential methods for their utilization. In the presented work, we investigated the recycling potential of wastes originated from the agricultural films recycling line. Their structure and properties were analyzed, and they were modified with 2.5 wt % of commercially available compatibilizers. The mechanical and thermal performance of modified wastes were evaluated by tensile tests, thermogravimetric analysis, and differential scanning calorimetry. It was found that incorporation of such a small amount of modifiers may overcome the drawbacks caused by the presence of impurities. The incorporation of maleic anhydride-grafted compounds enhanced the tensile strength of wastes by 13–25%. The use of more ductile compatibilizers—ethylene-vinyl acetate and paraffin increased the elongation at break by 55–64%. The presence of compatibilizers also reduced the stiffness of materials resulting from the presence of solid particles. It was particularly emphasized for styrene-ethylene-butadiene-styrene and ethylene-vinyl acetate copolymers, which caused up to a 20% drop of Young’s modulus. Such effects may facilitate the further applications of analyzed wastes, e.g., in polymer film production. Thermal performance was only slightly affected by compatibilization. It caused a slight reduction in polyethylene melting temperatures (up to 2.8 °C) and crystallinity degree (up to 16%). For more contaminated materials, the addition of compatibilizers caused a minor reduction in the decomposition onset (up to 6 °C). At the same time, for the waste after three washing cycles, thermal stability was improved. Moreover, depending on the desired properties and application, materials do not have to go through the whole recycling line, simplifying the process, reducing energy and water consumption. The presented results indicate that it is possible to efficiently use the materials, which do not have to undergo the whole recycling process. Despite the presence of impurities, they could be applied in the manufacturing of products which do not require exceptional mechanical performance.

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Section: Resultsmentioning

confidence: 99%

Wastes from Agricultural Silage Film Recycling Line as a Potential Polymer Materials

et al. 2021

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“…Importantly, their temperature resistance also differs, with PP offering a higher melt temperature of ∼160 °C compared to ∼107 °C for HDPE. 37 Whether or not these polymers will reach their melt temperature is determined both by their thermal conductance ( T C ) and their dissipation factors. For each material, those values are low (with a T C of 11 and 0.44 W mK −1 , and tan δ values of 3–5 × 10 −4 and 3–20 × 10 −4 , for PP and HDPE respectively).…”

Section: Resultsmentioning

confidence: 99%

“…Importantly, their temperature resistance also differs, with PP offering a higher melt temperature of ∼160 °C compared to ∼107 °C for HDPE. 37 Fig. 3 Measurement of internal well temperature (error bars represent the sample standard deviation around the mean, n = 11).…”

Section: Materials Compatibility With Progressive Heating Of Corrosiv...mentioning

confidence: 99%

Dielectric heating of highly corrosive and oxidizing reagents on a hybrid glass microfiber–polymer centrifugal microfluidic device

et al. 2022

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“…where ΔH m 0 = 198 J/g is the theoretical enthalpy of a 100% crystalline PP sample; 30 the term 1 − w corresponds to the PP weight fraction in the blend; and ΔH m is the measured melting enthalpy.…”

Section: Experimental Section/methodsmentioning

confidence: 99%

Biopolypropylene-Based Wood Plastic Composites Reinforced with Mango Peel Flour and Compatibilized with an Environmentally Friendly Copolymer from Itaconic Acid

Gomez‐Caturla

Balart

Martínez

et al. 2022

ACS Appl. Polym. Mater.

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This work reports on the successful development of biopolypropylene/mango peel flour (bioPP/MPF) composites using extrusion and injection molding processes. The compatibility between bioPP and MPF is improved through the use of PP-g-IA (3 phr) as a compatibilizer (which is prepared by reactive extrusion REX) and dicumyl peroxide (DCP) (1 phr) as a cross-linker. The mechanical, morphological, thermal, thermomechanical, chemical, colorimetric, water absorption, and flowability properties are characterized and analyzed. The results show that MPF (30 wt %) compatibilized with PP-g-IA and DCP increased the stiffness of bioPP in terms of Young’s modulus values. Elongation at break also shows very promising results, with a maximum value of almost 30% for the bioPP/MPF/PP-g-IA/DCP sample. PP-g-IA and DCP seem to exert a synergetic effect. Thermal stability is also improved as a result of these additives, as well as crystallinity, which is increased due to an heterogeneous nucleation phenomenon, enhanced by a higher dispersion of MPF particles in the matrix. Moreover, the excellent mechanical results are verified in FESEM images, where a very narrow gap between the MPF particles and the bioPP matrix is appreciated.

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Thermal properties of polypropylene and polyethylene blends (PP/LDPE)

Cited by 16 publications

References 4 publications

Wastes from Agricultural Silage Film Recycling Line as a Potential Polymer Materials

Wastes from Agricultural Silage Film Recycling Line as a Potential Polymer Materials

Dielectric heating of highly corrosive and oxidizing reagents on a hybrid glass microfiber–polymer centrifugal microfluidic device

Biopolypropylene-Based Wood Plastic Composites Reinforced with Mango Peel Flour and Compatibilized with an Environmentally Friendly Copolymer from Itaconic Acid

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