Ductile tear behavior of multilayered polypropylene homopolymer/ethylene 1‐octene copolymer sheets

He, Guansong; Zhang, Fengshun; Yu, Huaning; Li, Jiang; Guo, Shaoyun

doi:10.1002/app.43298

Cited by 6 publications

(4 citation statements)

References 39 publications

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“…It can be attributed to the fact that intense extensional stress can form the IMN structure and induce the formation of thicker lamellae (see SAXS and WAXD results), promoting a pronounced increase of the maximum piercing force . Furthermore, the excellent toughness of films can stabilize the crack growth and consume large amounts of energy …”

Section: Resultsmentioning

confidence: 99%

“…52 Furthermore, the excellent toughness of films can stabilize the crack growth and consume large amounts of energy. 53 Based on the findings, the specific mechanism is proposed to shed light on the formation of IMN and the improvement of integrated performance, illustrated in Figure 8. As shown in Figure 8a, the cocontinuous structure can evolve into IMN via "casting−thermal stretching".…”

Section: ■ Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Robust, Fully Biodegradable Films of Polyesters Realized by In Situ Formation of an Interconnected Multi-Nanolayer Structure under Extensional Flow

Sun

et al. 2023

ACS Appl. Mater. Interfaces

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Multilayer structures are not only applied to manipulate properties of synthetic polymer materials such as rainbow films and barrier films but also widely discovered in natural materials like nacre. In this work, in situ formation of an interconnected multi-nanolayer (IMN) structure in poly(butylene adipate-co-terephthalate) (PBAT)/poly(butylene succinate) (PBS) cocontinuous blends is designed by an extensional flow field during a “casting–thermal stretching” process, combining the properties of two components to a large extent. Hierarchical structures including phase morphology, crystal structure, and lamellar crystals in IMN films have been revealed, which clearly identifies the crucial role of extensional flow. The oriented PBAT phase in the IMN structure can be beneficial to the epitaxial growth of PBS crystals onto the PBAT nanolayers, thus improving interfacial adhesions. Furthermore, intense extensional stress can also promote crystallinity and thicken the lamellar structure. Given such distinct features in the fully biodegradable films, a simultaneous enhancement in tear strength, tensile strength, and puncture resistance has been achieved. To the best of our knowledge, the tear strength of IMN films about 285.9 kN/m is the highest level in the previous works of this system. Moreover, the proposed fabrication way of the IMN structure is facile and scalable, which is highly expected to be an efficient strategy for development of structured biodegradable polymers with excellent comprehensive properties.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Robust, Fully Biodegradable Films of Polyesters Realized by In Situ Formation of an Interconnected Multi-Nanolayer Structure under Extensional Flow

Sun

et al. 2023

ACS Appl. Mater. Interfaces

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“…The tear behavior of multilayered sheets, consisting of alternating PP and EOC layers, has also been investigated. He et al (2016) observed, for a PP/EOC multilayer film, that both the tear strength and energy are higher than those of the corresponding conventional blend.…”

Section: Introductionmentioning

confidence: 87%

Morphology in Multilayer Blown Films of Polypropylene and Ethylene-Octene Copolymer Blends

Silva

Elias

Lima

et al. 2018

International Polymer Processing

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In this work the microstructure of multilayer blown films consisting of a core layer placed between two external ones is studied. The core layer is a blend with 70 % (w/w) of a homopolypropylene PP and 30 % of a metallocene-catalyzed ethylene-octene copolymer mEOC (LLDPE or VLDPE), whereas the external symmetrical layers are composed of LLDPE or they have the same composition as the core layer. The PP and PE crystalline phases formed during the film blowing were investigated by thermal analysis, mechanical properties, TEM morphology and X-ray diffraction pole figures. These films successfully combine the high mechanical strength of PP with the quasi-isotropic behavior of blown PE. Multilayer film containing PP/mEOC blends, particularly blends of PP70/LLDPE30, show better balanced tensile properties when compared at crossed directions. The presence of VLDPE in the blends shifts downwards the melting and crystallization temperatures and crystallinity of PP. X-Ray pole figures suggest the occurrence of epitaxial crystallization of the PE phase upon the PP crystals in these PP/mEOC blend films.

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“…These structures make POE have better mechanical strength and weather resistance, while the cost is also reduced. 9 Considering the application field of this material, it is necessary to study its flame retardant modification. Deng et al 10 used modified ammonium polyphosphate (MAPP) to modify POE / PE thermoplastic elastomer.…”

Section: Introductionmentioning

confidence: 99%

PP/POE thermoplastic elastomer prepared by dynamic vulcanization and its flame retardant modification

Wang

Shen

et al. 2021

Journal of Elastomers & Plastics

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Flame retardant thermoplastic elastomer (TPE) with excellent mechanical properties and thermal oxidative aging resistance was prepared by dynamic vulcanization technology with ethylene-octene copolymer (POE) and polypropylene (PP) as raw materials. The paper first discussed the effect of the amount of vulcanizing agent on the properties of PP/POE TPE. Based on the study of tensile strength, elongation at break, cross-section morphology, processability and aging properties of TPE, it was found that the TPE prepared with 0.6 phr of bis(1-(tert-butylperoxy)-1-methylethyl)-benzene (BIPB) and 40/60 of PP/POE had the best properties. Then silicone powder (GM) is added to the traditional low-halogen bromine-phosphorus flame retardant system for flame retardant modification. The results show that the addition of GM can effectively enhance the stability of the carbon layer, prevent the material from dripping during combustion, and increase the residual carbon content of TPE at 800°C. When 3 phr of GM is combined with a bromine-phosphorus system. The comprehensive performance is the best, the limiting oxygen index (LOI) of TPE increased to 29.8%, reaching the V-0 level. At the same time, the processing fluidity and aging resistance of TPE materials have also been improved.

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Ductile tear behavior of multilayered polypropylene homopolymer/ethylene 1‐octene copolymer sheets

Cited by 6 publications

References 39 publications

Robust, Fully Biodegradable Films of Polyesters Realized by In Situ Formation of an Interconnected Multi-Nanolayer Structure under Extensional Flow

Robust, Fully Biodegradable Films of Polyesters Realized by In Situ Formation of an Interconnected Multi-Nanolayer Structure under Extensional Flow

Morphology in Multilayer Blown Films of Polypropylene and Ethylene-Octene Copolymer Blends

PP/POE thermoplastic elastomer prepared by dynamic vulcanization and its flame retardant modification

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