Effects of toughening propylene/ethylene graft copolymer on the crystallization behavior and mechanical properties of polypropylene random-copolymerized with a small amount of ethylene

Shao, Yutong; Wu, Chonggang; Cheng, Siyi; Zhou, Feng; Yan, Hai-Biao

doi:10.1016/j.polymertesting.2014.12.008

Cited by 11 publications

(8 citation statements)

References 16 publications

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“…In this work, SEM images show brittle and plastic deformation for PP‐1 and PP‐2 in the fracture surfaces, respectively. Plastic deformation absorbs more energy and tends to increase toughness values and this was observed for PP‐2 in this work.…”

Section: Resultssupporting

confidence: 69%

“…). Three main peaks at 2 θ scattering angles of (13.92), (16.74) and (18.42) were observed in PP‐1, and these represent diffraction from the crystallographic planes of 110, 040, and 130, respectively, for the α crystal form of PP . In PP‐2, the intensity of these three peaks is seen to be reduced particularly for the (130) plane peak at 18.42 [°2 θ ] scattering angle.…”

Section: Resultsmentioning

confidence: 96%

“…c and d, PP‐1 shows the flat and smooth surfaces that are related to brittle fracture with lower plastic deformation, whereas for PP‐2 the surfaces are wavy and patchy, with microvoiding due to the debonding between the PP matrix and PE phases. For PP‐2 micro‐voiding, wavy or patchy‐like structures that act to increase plastic deformation with increasing ductility and fracture toughness values were observed.…”

Section: Resultsmentioning

confidence: 99%

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Fracture toughness of rotationally molded polyethylene and polypropylene

Saifullah¹,

Thomas

Cripps³

et al. 2017

Polymer Engineering & Sci

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In this work, the fracture toughness of rotationally molded polyethylene (PE) and polypropylene (PP) was measured using J integral methods at static loading rates and at room temperature. Two different commercially available rotational molding grades PE and PP were tested in this study which have been used in various rotationally molded products such as small leisure craft, water storage tanks, and so on. Scanning electron microscope (SEM), optical microscope, differential scanning calorimetry (DSC), solidstate nuclear magnetic resonance (solid-state NMR), and X-ray scattering were used to investigate the microstructure, fracture surfaces, and compare toughness properties of these materials. In PE, higher molecular weight and broader molecular weight distribution, larger amorphous and crystal region thicknesses are found to be related to higher toughness values. High molecular weight favors higher number of entanglements that improve fracture energy and broader distribution increases long chain branching of higher molecular weight fractions which creates higher entanglements at the branch sites. Larger amorphous regions promote microvoiding more easily compared to thinner amorphous regions, leading to greater plastic deformation and energy absorption. Higher crystal thickness also contributes to microvoiding in the amorphous region. For PP, greater plastic deformation observed in the fracture surfaces is related to higher fracture toughness values. POLYM. ENG. SCI., 58:63-73, 2018.

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Section: Resultssupporting

confidence: 69%

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

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Fracture toughness of rotationally molded polyethylene and polypropylene

Saifullah¹,

Thomas

Cripps³

et al. 2017

Polymer Engineering & Sci

View full text Add to dashboard Cite

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“…17,18 Besides, the diffraction intensity of modified PP nonwoven fabric is weaker than that without modification, which shows another difference between these two nonwoven fabrics. The weak diffraction intensity of the modified PP nonwoven fabric indicates that the spherulite size becomes tiny compared with the PP nonwoven, 19,20 which was attributed to the increased nucleation sites caused by the nano-CaCO 3 particles.…”

Section: Resultsmentioning

confidence: 99%

Aging behavior of nano-CaCO₃-modified polypropylene nonwoven fabric composites

Wang

Fang

et al. 2020

Polymers and Polymer Composites

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Nano-CaCO3-modified polypropylene (PP) nonwoven fabric composite is widely used as the filter material which could overcome the poor lightfastness and low weight of the pure one, while its aging performances would be influenced. In this article, the aging behavior of the nano-CaCO3-modified PP nonwoven fabric composite was investigated. At first, the difference between untreated and CaCO3-modified PP nonwoven fabric was analyzed by scanning electron microscopy, thermogravimetric/differential thermal analysis, and X-ray diffraction. Then the aging behaviors of these two PP nonwoven fabrics were studied in detail. The results showed that the PP nonwoven fabric exhibited good acid corrosion resistance. On the contrary, acid corrosion resistance of the modified PP nonwoven fabric was poor; although its weight and strength didn’t change under weak acid condition, its weight and strength loss both increased obviously under medium and strong acid condition with the prolongation of corrosion time. Due to the ultraviolet (UV) energy dissipation of nano-CaCO3 particles, the UV aging resistance of the modified PP nonwoven fabric was improved, and the compound UV aging under weak acid condition was also superior to that of the untreated PP fabric. This article will provide experimental and theoretical base for the structural regulation of CaCO3-modified PP fibers.

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“…However, neat PP is associated with certain drawbacks such as oxidative degradation due to the presence of tertiary carbon atom in the main polymer backbone and molding shrinkage. Several modifications have been performed to improve these drawbacks of PP, for example, synthesis of PP/polyethylene graft copolymer resulted in an enhanced rate of crystallization and impact strength . The mechanical properties of isotactic PP can be further improved by incorporation of β‐nucleating agent in the PP matrix .…”

Section: Introductionmentioning

confidence: 99%

Comprehensive studies on polyethylenimine filled polypropylene and its potential application in carbon dioxide sequestration

Patra

Jaisingh

Goel

et al. 2019

Polymer Engineering & Sci

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Polypropylene (PP) was blended with branched polyethylenimine (PEI) with the aim to prepare blends having CO 2 adsorption property. The CO 2 adsorption properties will be conferred due to the presence of variety of amine functionality in PEI. PEI contains primary, secondary as well as tertiary amine groups. Before testing CO 2 adsorption, PP-PEI blends were characterized using variety of techniques, for example, differential scanning calorimetry, thermogravimetric analysis, dynamic mechanical analysis, scanning electron microscopy, and polarized light optical microscopy. In this work, we have studied in detail both compatibilized as well as noncompatibilized blends of PP and PEI. The compatibilization was achieved via addition of maleic anhydride grafted PP. Finally, all the compatibilized as well as noncompatibilized blends were studied for CO 2 adsorption. The compatibilized blends showed better thermal, mechanical as well as CO 2 adsorption properties as compared to the noncompatibilized blends. POLYM. ENG.

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Effects of toughening propylene/ethylene graft copolymer on the crystallization behavior and mechanical properties of polypropylene random-copolymerized with a small amount of ethylene

Cited by 11 publications

References 16 publications

Fracture toughness of rotationally molded polyethylene and polypropylene

Fracture toughness of rotationally molded polyethylene and polypropylene

Aging behavior of nano-CaCO₃-modified polypropylene nonwoven fabric composites

Comprehensive studies on polyethylenimine filled polypropylene and its potential application in carbon dioxide sequestration

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Effects of toughening propylene/ethylene graft copolymer on the crystallization behavior and mechanical properties of polypropylene random-copolymerized with a small amount of ethylene

Cited by 11 publications

References 16 publications

Fracture toughness of rotationally molded polyethylene and polypropylene

Fracture toughness of rotationally molded polyethylene and polypropylene

Aging behavior of nano-CaCO3-modified polypropylene nonwoven fabric composites

Comprehensive studies on polyethylenimine filled polypropylene and its potential application in carbon dioxide sequestration

Contact Info

Product

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Aging behavior of nano-CaCO₃-modified polypropylene nonwoven fabric composites