Thermal and Rheological Properties of Poly(lactic acid)/Low-Density Polyethylene Blends and Their Supercritical CO2 Foaming Behavior

Zhou, Hongfu; Zhao, Mingming; Qu, Zhongjie; Mi, Jianguo; Wang, Xiangdong; Deng, Yafeng

doi:10.1007/s10924-018-1240-5

Cited by 30 publications

(26 citation statements)

References 34 publications

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“…Because a cocontinuous morphologies emerged when the concentration of PEO was more than 30%. The interface bonding force between PCL and PEO phases was too large to help cell nucleation and cell growth, 34,35 so that it would be difficult to initiate the opening of a cell at the cell wall because of the higher melt strength. Aer the leaching process, the open-pore content was obviously improved for all the foamed samples, and the maximum porosity of 85% was detected with PCL70.…”

Section: Overall Porosity and Interconnectivity Of Scaffoldsmentioning

confidence: 99%

Fabrication of fibrillated and interconnected porous poly(ε-caprolactone) vascular tissue engineering scaffolds by microcellular foaming and polymer leaching

et al. 2020

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Section: Overall Porosity and Interconnectivity Of Scaffoldsmentioning

confidence: 99%

Fabrication of fibrillated and interconnected porous poly(ε-caprolactone) vascular tissue engineering scaffolds by microcellular foaming and polymer leaching

et al. 2020

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“…DCMP possessed a low melting temperature peak and a high melting temperature peak. The appearance of DCMP should be ascribed to the melt of PE crystalline region and PBS crystalline region, respectively . Furthermore, as the content of PE‐ g ‐GMA increased further, DCMP shifted close to each other (marked by red dotted lines), suggesting that the PE crystalline region in PBS/PE‐ g ‐GMA samples became perfect gradually.…”

Section: Resultsmentioning

confidence: 88%

“…The explanation for the increment in the cell density of various PBS samples could be explained by three reasons . First, the enhanced melt strength and viscosity of various PBS samples by chain extension (Figure ) would inhibit the cell combination and cell growth, resulting in raising their cell density.…”

Section: Resultsmentioning

confidence: 99%

“…The appearance of DCMP should be ascribed to the melt of PE crystalline region and PBS crystalline region, respectively. 49,50 Furthermore, as the content of PE-g-GMA increased further, DCMP shifted close to each other (marked by red dotted lines), suggesting that the PE crystalline region in PBS/PE-g-GMA samples became perfect gradually. The appearance of DCMP could provide a potential prospect for the preparation of PBS foaming beads in future.…”

Section: Crystallization and Melting Behaviorsmentioning

confidence: 91%

“…44,60 The explanation for the increment in the cell density of various PBS samples could be explained by three reasons. 50,61 First, the enhanced melt strength and viscosity of various PBS samples by chain extension (Figure 6) would inhibit the cell combination and cell growth, resulting in raising their cell density. Second, the branching structures in various PBS samples could be acted as the sites of crystallization nucleation to produce abundant but tiny spherocrystals ( Figure 4 and Table III), which could be served as the sites of cell nucleation in the foaming process, leading to increase their cell density.…”

Section: Rheological Propertiesmentioning

confidence: 99%

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Simple and feasible strategy to fabricate microcellular poly(butylene succinate) foams by chain extension and isothermal crystallization induction

Yin

Zhou

et al. 2019

J of Applied Polymer Sci

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In this article, a facile and efficient isothermal crystallization induction method was proposed to fabricate microcellular poly(butylene succinate) (PBS) foams with supercritical CO2. The good regularity of PE chain segments and high reactive epoxy groups in ethylene‐glycidyl methacrylate copolymer (PE‐g‐GMA) serving as a chain extender were employed to improve the crystallization behaviors, viscoelasticity, and foaming behaviors of PBS through chain extension reaction. The effect of PE‐g‐GMA content on the thermal properties, rheological performances, and cellular morphology of various PBS samples was investigated systematically. When the PE‐g‐GMA content switched from 7.5 to 10 wt %, an interesting transition from fine cells to microcells was observed in PBS/PE‐g‐GMA foams. Microcellular PBS foam modified by 10 wt % PE‐g‐GMA was successfully prepared at the foaming temperature of 87 °C and the induction time of 7 min, in which its cell size and cell density could reach 6.63 ± 1.93 μm and 3.75 × 109 cells cm−3, respectively. The formation of abundant but tiny spherocrystals in chain extended PBS samples made a considerable contribution for preparing microcellular PBS foams. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48850.

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High strength and light weight polyamide 6/carbon fiber composite foams for electromagnetic interference shielding

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Jiang

Zeng

et al. 2023

J of Applied Polymer Sci

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In this study, high strength and light weight polyamide 6/carbon fiber (PA6/CF) composite foams were prepared by chemical injection foaming method. The foaming performance, electromagnetic interference (EMI) shielding efficiency total(SE T ), and mechanical properties of PA6/CF composite foams with different CF contents were investigated. The results show that the shear viscosity and strain hardening behavior obvious increased with the augment of CF content, which helped to PA6/CF composite foams to take the cell structure with smaller size, greater density, and more regular morphology.PA6/CF composite foam with cell size of 56.8 μm, and cell density of 1.81 Â 10 6 cells/cm 3 was achieved at 22 wt% CF. Meanwhile, PA6/CF composite foam had good EMI SE T , at 22 wt% CF addition. The specific EMI SE T of PA6/CF composite foam is 36.6 dB, 27.6% higher than that of solid 26.5 dB, the excellent cell structure helps to improve the EMI SE T . In addition, PA6/CF composite foams also had excellent mechanical properties. Therefore, PA6/CF composite foams had broad application prospect in EMI shielding materials field, combining the advantages of simple preparation process, light weight and EMI shielding.

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Thermal and Rheological Properties of Poly(lactic acid)/Low-Density Polyethylene Blends and Their Supercritical CO2 Foaming Behavior

Cited by 30 publications

References 34 publications

Fabrication of fibrillated and interconnected porous poly(ε-caprolactone) vascular tissue engineering scaffolds by microcellular foaming and polymer leaching

Fabrication of fibrillated and interconnected porous poly(ε-caprolactone) vascular tissue engineering scaffolds by microcellular foaming and polymer leaching

Simple and feasible strategy to fabricate microcellular poly(butylene succinate) foams by chain extension and isothermal crystallization induction

High strength and light weight polyamide 6/carbon fiber composite foams for electromagnetic interference shielding

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