The Influence of Pressure-Induced-Flow Processing on the Morphology, Thermal and Mechanical Properties of Polypropylene Blends

Li, Pengfei; Fei, Yanpei; Ruan, Shilun; Yang, Jianjiang; Chen, Feng; Jin, Yiming

doi:10.3390/jcs5030064

Cited by 4 publications

(3 citation statements)

References 40 publications

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“…Li et al 9 investigated the toughening efficiency of POE6202 on PP/POE blends, and showed that the impact strength of blends increased and then declined upon increasing of POE dosage, and the best performance was achieved when 20 wt% POE6202 was added. The toughening effect is also closely associated with the processing conditions 17–19 . Munoz‐Pascual's group 18 revealed that a higher mold temperature increased the impact resistance of PP/POE blends due to the lower shear and slower crystallization.…”

Section: Introductionmentioning

confidence: 99%

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Realizing simultaneous high‐temperature strength and low‐temperature elongation in polyolefin elastomer toughened polypropylene via controlling the dispersed phase size

Chen

Cao

Guo

et al. 2022

J of Applied Polymer Sci

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The properties of modified polypropylene (PP) materials are closely related to their phase structure. In this work, polyolefin elastomer (POE)-toughened PP materials with different phase structures were designed by using various types of POEs (ethylene-butene 710, 110, ethylene-propylene 6202, ethylene-octene 8200). Then, the effects of phase separation in PP/POE blends on both thermal and tensile properties as well as ultraviolet (UV) resistance were investigated. The results revealed that the POE type hardly affected the melt flow rate, melting or crystallization behavior of the modified PP samples. Moreover, scanning electron microscopy results showed that POE6202 had a smaller dispersed phase size in PP (0.1-0.5 μm), which improved the low-temperature elongation at break. PP/POE110 blends with a larger microdomain (1-5 μm) had better high-temperature tensile strength. Further, when toughened with POE110 and POE6202 simultaneously, modified PP had excellent low-temperature elongation (272%@ À40 C) without sacrificing as much of its high-temperature tensile strength (10.4 MPa@70 C). Finally, Electron Paramagnetic Resonance tests showed that the addition of amorphous POE decreased the intensity of free radicals generated in PP during irradiation and promoted their attenuation during decay. This indicated that the introduction of POE improved the UV resistance of PP.phase structure, polyolefin elastomer, polypropylene, tensile properties, UV resistance | INTRODUCTIONPolypropylene (PP) is an inexpensive versatile commercial thermoplastic with high rigidity and excellent chemical resistance. 1 However, its poor impact performance and low-temperature brittleness 2 limit its industrial application. Polyolefin elastomers (POE), copolymerized with ethylene and an α-olefin, are one of the most commonly used toughening materials due to their excellent toughness and stiffness. 3 The toughening effect is related to the type 4-6 and dosage [7][8][9][10][11] of POE, the molecular weight and its distribution of PP, 12,13 as well as the crystalline structure of PP. [14][15][16] For example, Wang et al. 4 evaluated the effect of the POE type (ethylene/1-octene random copolymer POE8200 and ethylene/propylene copolymer POE6202) on the impact strength of toughened PP, and found that

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Section: Introductionmentioning

confidence: 99%

“…The toughening effect is also closely associated with the processing conditions. [17][18][19] Munoz-Pascual's group 18 revealed that a higher mold temperature increased the impact resistance of PP/POE blends due to the lower shear and slower crystallization.…”

mentioning

confidence: 99%

Realizing simultaneous high‐temperature strength and low‐temperature elongation in polyolefin elastomer toughened polypropylene via controlling the dispersed phase size

Chen

Cao

Guo

et al. 2022

J of Applied Polymer Sci

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“…Therefore, a compatibilizer and surfactant are required to improve the dispersion and compatibility between the glass fibers, clay particles, and polymer in fiber-reinforced polymer composites. In particular, many earlier studies have utilized polypropylene-graft-maleic anhydride (PP-g-MA) [30][31][32] and polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene-graft maleic anhydride (SEBS-g-MA) [30,33] as the compatibilizer and toughening agent, respectively, and a cationic surfactant, viz., octadecyl-trimethyl-ammonium bromide (ODAB) for the dispersion and exfoliation of the nanoclay particles [34,35]. PP-g-MA has better ductility than PA6, and it can blend homogeneously with the PA6 resin through melt compounding at temperatures exceeding 200 • C. The resulting composite demonstrates improved crystallinity and tribological properties because maleated PP acts as a nucleating agent, stabilizes the crystalline site, and accelerates the nucleation of the polymer [36][37][38], but also reduces the interfacial tension between the PA6 chains, facilitating the uniform clay intercalation to polymer chains [27,39].…”

Section: Introductionmentioning

confidence: 99%

Effects of the Simultaneous Strengthening of the Glass Fiber Surface and Polyamide-6 Matrix by Plasma Treatment and Nanoclay Addition on the Mechanical Properties of Multiscale Hybrid Composites

Kim

Lee

et al. 2023

J. Compos. Sci.

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To strengthen the mechanical properties of a fiber-reinforced plastic without deteriorating its toughness caused by adding nanomaterial, multiscale hybrid composites (MHC) composed of polyamide 6 (PA6), woven glass fibers (WGFs), nanoclay, and various additives were fabricated and characterized. A surfactant was used to improve the dispersion of the nanoclay in the composite, and a compatibilizer and toughening agent were added to enhance the interfacial interactions between the nanoclay and PA6 and the toughness of the MHC, respectively. In addition, the WGFs were pretreated with atmospheric-pressure air plasma to enhance the interfacial bonding between the WGF and the mixture composed of PA6/nanoclay/compatibilizer/toughening agent, which constitutes the matrix. The optimal composition of the PA6 mixture, optimal content of the nanoclay, and optimal conditions of the plasma pretreatment of the WGF surface were experimentally determined. A suitable manufacturing process was employed using a material composition that maximizes the mechanical properties of the MHC by mitigating the toughness deterioration owing to nanoclay addition. An appropriate quantity of the nanoclay increased the tensile properties as well as the elongation at the break of the MHC because the toughening agent prevented the reduction in the degree of elongation caused by increasing the clay content to a certain extent. Moreover, the plasma treatment of the WGF enhanced the flexural properties and impact resistance of the MHC. Therefore, not only the tensile strength, modulus, and elongation at the break of the PA6 nanocomposite, which constitutes the matrix of the MHC, increased up to 39.83, 40.91, and 194.26%, respectively, but also the flexural strength and modulus, absorbed impact energy, and penetration limit of the MHC increased by 20.2, 26.8, 83.7, and 100.0%, respectively.

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High sound insulation property of prepared polypropylene/polyolefin elastomer blends by combining pressure-induced-flow processing and supercritical CO2 foaming

Chen

Fei

et al. 2021

Composites Communications

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The Influence of Pressure-Induced-Flow Processing on the Morphology, Thermal and Mechanical Properties of Polypropylene Blends

Cited by 4 publications

References 40 publications

Realizing simultaneous high‐temperature strength and low‐temperature elongation in polyolefin elastomer toughened polypropylene via controlling the dispersed phase size

Realizing simultaneous high‐temperature strength and low‐temperature elongation in polyolefin elastomer toughened polypropylene via controlling the dispersed phase size

Effects of the Simultaneous Strengthening of the Glass Fiber Surface and Polyamide-6 Matrix by Plasma Treatment and Nanoclay Addition on the Mechanical Properties of Multiscale Hybrid Composites

High sound insulation property of prepared polypropylene/polyolefin elastomer blends by combining pressure-induced-flow processing and supercritical CO2 foaming

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