High-g impact resistance for epoxy molding compound

Hong, Jin Seong; Jing, Zu; Xu, Peng; Ma, Tiehua

doi:10.1007/s11595-010-0049-4

Cited by 3 publications

(4 citation statements)

References 15 publications

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“…Based on pyrolysis products analysis and the bond energy theory, the pyrolysis mechanisms of organics in EMC were proposed, as shown in Figure . For thermal-instable ingredients, the pyrolysis process of polymers is composed of a series of free radical reactions based on fracture and combination of chemical bonds initiated by energy provided by the reaction system. , First, scission of the main chain and the fracture of C–CH 3 bonds occurred due to the fractures of chemical bonds with lower bond energies. The derived methyl groups played an important role in later reactions.…”

Section: Resultsmentioning

confidence: 99%

“…A total of 10 mg of the samples of raw material was heated from 30 to 900 °C at three constant rates (10, 20, and 30 °C/min) under an argon flow of 50 mL/min. The apparent activation energy was calculated based on the Flynn–Wall–Ozawa equation − expressed as eq . where β is the heating rate, g (α) is the integrated form of the conversion dependence function, R is the mol gas constant (8.314 J/mol·K), T is the thermodynamic temperature, and E is the apparent activation energy. The activation energy can be determined by the slope of linear function plot of log β versus 1/ T at given value of the conversion.…”

Section: Methodsmentioning

confidence: 99%

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Pyrolysis-Based Technology for Recovering Copper from Transistors on Waste Printed Circuit Boards

Wang

2017

ACS Sustainable Chem. Eng.

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Waste electronic components (ECs) recycling is a crucial part of waste printed circuit boards (WPCBs) recycling system. Waste transistors (WTs) are one of the largest obsolete ECs whose recycling technology has been poorly developed. This study presented a pyrolysis-based technology for recovering copper from WTs disassembled from WPCBs, including coarse crushing, pyrolysis, pulverizing, and sieving. First, the WTs were coarsely crushed to reduce the particle size of the epoxy molding compound (EMC). Second, the coarsely crushed WTs were pyrolyzed to damage the cross-linking network structure of EMC and reduce the hardness of EMC. Third, all of the pyrolysis residues were crushed and sieved to separate metals and nonmetals. Finally, an integrated recycling process was proposed based on above studies. In addition, the mechanism of the pyrolysis was analyzed based on bond theory and product analysis to deeply understand the recycling process. Under optimal conditions, 99.16% of copper in WTs were recovered with a purity of 92.75%. This paper provides a method for waste transistors recycling in an efficient and environmentally friendly way.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Pyrolysis-Based Technology for Recovering Copper from Transistors on Waste Printed Circuit Boards

Wang

2017

ACS Sustainable Chem. Eng.

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“…Researchers have also attempted to composite other carbon materials to improve material properties. Jin 75 composited ZIF-8 crystals with carbon paper (CP) by hydrothermal method and successfully prepared ZIF-8/CP-CH 3 OH composites at different hydrothermal temperatures to study the effects of hydrothermal temperatures on the desalination amount and desalination efficiency of the ZIF-8/CP-CH 3 OH composites. Results revealed that the loading of carbonized MOFs would greatly improve the desalination capacity and desalination efficiency of CP.…”

Section: Zif-8 Derived Carbon As CDI Electrode Materialsmentioning

confidence: 99%

Research Progress of Carbon Materials Derived from the Zn-Based Metal-Organic Frameworks in Capacitive Deionization

San¹,

Feng²,

Xu³

et al. 2022

J. Electrochem. Soc.

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The scarcity of fresh water resource has become one of the top concerns of modern society. Various water treatment technologies have been developed for the reuse of seawater and capacitive deionization (CDI) holds superior advantages as a promising electrosorption desalination technology. Since electrode material is the key factor in controlling the performance of CDI, recent years have witnessed considerable research progress in the rational design and fabrication of Zn-based MOF-derived carbon materials applied as electrode materials for CDI. In this review, Zn-based MOF-derived carbon materials, including MOF-5 derived carbons, ZIF-8 derived carbons and innovation Zn-based MOF derived carbons, are systematically overviewed based on their MOF template precursors. Among them, ZIF-8 derived carbon electrode materials are summarized in detail and different approaches for the improvement of their CDI performance are particularly discussed. We believe this review could function as a guidance of innovative development of Zn-based MOF-derived carbon materials and provide future directions for further improving their CDI performance.

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“…In addition, the diameter of these holes is consistent with the size of ASA particles, 24 which further proves this point. However, with the incorporation of SBS, the SBS phase is obvious on the cryo-fractured surfaces because of the poor miscibility between SBS and PVC, 25 and its size increases with the increasing SBS content, which can preliminarily judge that ASA and SBS are dispersed in the PVC matrix. After surface etching by toluene, the cryo-fractured surface of the neat PVC is still flat.…”

Section: Prediction and Verification Of The Phase Morphology Of Ternamentioning

confidence: 99%

Study of the phase morphology and toughness in poly (vinyl chloride)/acrylonitrile–styrene‐acrylic/styrene–butadiene–styrene ternary blends influenced by interfacial/surface tension

Zhang

Mao

Zhang

2019

J of Applied Polymer Sci

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The effect of interfacial interaction on the phase morphology and toughness of poly (vinyl chloride) (PVC)/acrylonitrile–styrene‐acrylic (ASA) terpolymer/styrene–butadiene–styrene (SBS) block copolymer ternary blends has been investigated. Water and diiodomethane liquids were used for static contact angle measurements to get surface tension and calculate interfacial tension. A dispersed phase morphology of ASA and SBS in the PVC matrix was predicted by the spreading coefficient theory, which was calculated through interfacial tensions between different polymer pairs. Extraction experiment and scanning electron microscopy were combined to verify this morphology. When the volume fraction of SBS was small, SBS was dispersed in the matrix as droplets and the strong PVC/styrene–acrylonitrile interfacial interaction made up for the poor interfacial adhesion between SBS and PVC. Herein, SBS showed an effective toughening effect on PVC/ASA blends. With the addition of 2.5‐ and 5‐phr SBS, the blends had the highest impact strength of 88.75 kJ/m2 at 23 °C and 9.98 kJ/m2 at 0 °C, respectively. With the further increase of the SBS content, the diameter of the SBS drops increased largely and the poor interfacial adhesion between SBS and PVC played a leading role, resulting in a sharp decrease in toughness and a sharp ductile–brittle transition. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47721.

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High-g impact resistance for epoxy molding compound

Cited by 3 publications

References 15 publications

Pyrolysis-Based Technology for Recovering Copper from Transistors on Waste Printed Circuit Boards

Pyrolysis-Based Technology for Recovering Copper from Transistors on Waste Printed Circuit Boards

Research Progress of Carbon Materials Derived from the Zn-Based Metal-Organic Frameworks in Capacitive Deionization

Study of the phase morphology and toughness in poly (vinyl chloride)/acrylonitrile–styrene‐acrylic/styrene–butadiene–styrene ternary blends influenced by interfacial/surface tension

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