Microcellular foaming and mechanical properties of iPP-iPPF using supercritical CO2

Zuo, Kailong; Li, Kun; Yun, Zhigeng; He, Guangjian; Islam, Syed Rashedul; Yang, Yang; Zhang, Xiaoli

doi:10.1016/j.supflu.2022.105754

Cited by 2 publications

(2 citation statements)

References 47 publications

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“…Stress–strain curves of the different samples (a) with tensile strength and impact strength (b). Comparison of the mechanical properties of the nacre-like lamellar sample with other high-performance PP samples − (c). The TG curves of the different samples (d).…”

Section: Resultsmentioning

confidence: 99%

Low-Temperature Assembling Strategy of a Nacre-Inspired Lamellar Configuration to Upcycling Biaxially Oriented Polypropylene Film Waste

Jiang,

Wu,

Nie

et al. 2023

ACS Omega

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The efficient recycling and utilization of plastic waste have become a hot topic of global concern, but conventional mechanical recycling not only deteriorates the performance of recycled plastic but also loses the intrinsic structure and properties of the original product. Herein, an upcycling strategy of a biaxially oriented polypropylene (BOPP) film was proposed by duplicating the lamellar configuration established in nature nacre. Especially the suspension of PP wax was deposited on the surface of the BOPP film by spray-coating, followed by layer-by-layer assembling and hot-pressing at 160 °C above the melting temperature of PP wax but below the initial melting temperature of the BOPP film. In this case, PP wax not only functioned as a binder to enable strong interfacial adhesion between the BOPP films via interfacial diffusion but also acted as a soft phase to insert between the rigid BOPP films, constructing a soft–hard alternatively aligned configuration similar to brick-and-mortar architecture in nature nacre. As a result, the mechanical properties of the lamellar sample markedly outperformed those of the conventional mechanically recycling sample, evidenced by 113 and 1141% increases in tensile strength and impact strength, respectively. This simple and effective method provides a new strategy for efficient upcycling of oriented packaging films, which is important to realize the sustainable recycling of plastic waste.

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Section: Resultsmentioning

confidence: 99%

Low-Temperature Assembling Strategy of a Nacre-Inspired Lamellar Configuration to Upcycling Biaxially Oriented Polypropylene Film Waste

Jiang,

Wu,

Nie

et al. 2023

ACS Omega

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“…IPPF offers objective environmental support that can increase the tolerance of enterprise innovation, thereby enhancing the risk tolerance of managers. IPPF will also provide positive signals to the management of enterprises, improve the level of internal informatization, and ultimately lead to an increase in manager risk aversion [40].…”

Section: The Impact Of Ippf On Internal Managementmentioning

confidence: 99%

Intellectual Property Pledge Financing and Enterprise Innovation: Based on the Perspective of Signal Incentive

2023

Sustainability

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As a driving force behind urban sustainable development, enterprise innovation has become an increasingly important issue in the digital economy. In this context, a financing model called intellectual property pledge financing (IPPF) has been widely implemented, potentially promoting innovation output in developed countries. However, for countries with relatively low levels of intellectual property (IP) protection, the impact of IPPF on enterprise innovation is divergent, as it may lead to patent signal failure. China’s implementation of IPPF since 2008 provides an ideal quasi-natural experiment for researching IPPF in such countries. Using panel data of China’s listed companies from 2007 to 2017, we employ the staggered Difference-in-Differences (DID) method to examine the impact of IPPF on enterprise innovation. The results demonstrate a significantly positive impact overall, with a more pronounced effect in urban areas characterized by high intellectual property protection and digitalization. Various robust tests, including event study, Bacon decomposition, and propensity score matching (PSM), were conducted. Additionally, our findings suggest that IPPF facilitates enterprise innovation by expanding external credit resources and optimizing internal management from the perspective of open innovation (OI). It signals banks and investors to provide favorable credit support externally, helps alleviate managerial myopia, and increases manager risk preference internally. These results offer empirical evidence and suggestions for promoting IPPF as a means to stimulate enterprise innovation and achieve urban economic sustainable development.

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Microcellular foaming and mechanical properties of iPP-iPPF using supercritical CO2

Cited by 2 publications

References 47 publications

Low-Temperature Assembling Strategy of a Nacre-Inspired Lamellar Configuration to Upcycling Biaxially Oriented Polypropylene Film Waste

Low-Temperature Assembling Strategy of a Nacre-Inspired Lamellar Configuration to Upcycling Biaxially Oriented Polypropylene Film Waste

Intellectual Property Pledge Financing and Enterprise Innovation: Based on the Perspective of Signal Incentive

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