Preparation of recycled polyethylene terephthalate composite foams and their feasible evaluation for electronic packages

Lai, Chiu‐Chun; Yu, Chun-Ta; Wang, Fuming; Hsiao, Ho-Ting; Liang, Wen-Chung; Ho, Yi-Hsueh; Teng, Wei-Feng; Liu, Lung-Chang; Chen, Chien‐Ming

doi:10.1016/j.polymertesting.2018.12.009

Cited by 22 publications

(7 citation statements)

References 12 publications

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“…Another method for addressing environmental pollution is recycling waste polymer foams, such as polyethylene terephthalate (PET) foam and phenolic foam [122,123,124,125,126,127,128]. Gaidukova et al [124] prepared PU rigid foams from bio-based and recycled PET.…”

Section: Current Problems and Possible Solutionsmentioning

confidence: 99%

“…The water absorption of the foams was below 3 wt%. Lai et al [125] prepared PET composite foams using recycled PET foams by a thermochemical extrusion foaming process. The resulting PET foams showed a crystallization temperature of 217 °C, flexural strength of 623 kgf/cm 2 , flexural modulus of 22,881 kgf/cm 2 , density of 0.85 g/cm 3 , average cell size of 160 μm, and Izod impact strength of 155 J/m.…”

Section: Current Problems and Possible Solutionsmentioning

confidence: 99%

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Recent Trends of Foaming in Polymer Processing: A Review

et al. 2019

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Polymer foams have low density, good heat insulation, good sound insulation effects, high specific strength, and high corrosion resistance, and are widely used in civil and industrial applications. In this paper, the classification of polymer foams, principles of the foaming process, types of blowing agents, and raw materials of polymer foams are reviewed. The research progress of various foaming methods and the current problems and possible solutions are discussed in detail.

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Section: Current Problems and Possible Solutionsmentioning

confidence: 99%

Section: Current Problems and Possible Solutionsmentioning

confidence: 99%

Recent Trends of Foaming in Polymer Processing: A Review

et al. 2019

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“…A larger shift is observed for the (100) peak. It can be detected that the crystallite size of samples isotherm crystallized at 423 or 453 K differs significantly from the samples crystallized at 483 K in the direction of D (1)(2)(3)(4)(5)(6)(7)(8)(9)(10) , D (100) and D (101) which may indicate a different nucleation process. Based on the sizes measured for the first three peaks, the crystallites tend to take isometric shape at 488 K, while platy shape is the most characteristic at room temperature.…”

Section: Crystalline Form Analysismentioning

confidence: 95%

“…The usage of poly(ethylene terephthalate) (PET) still increases nowadays; in original form and as secondary raw material alike [1,2]. Besides the packaging industry, PET is increasingly used as a technical material thanks to the achievements of the material developments (Solid State Polycondensation reaction (SSP) or chain extender additives) and the advancements in the processing technologies (foam forming, 3D printing) [3][4][5][6][7]. Regarding applicability of the final products the mechanical properties are crucial, which are greatly affected by the morphology and crystalline structure formed during processing [8,9].…”

Section: Introductionmentioning

confidence: 99%

Melting temperature versus crystallinity: new way for identification and analysis of multiple endotherms of poly(ethylene terephthalate)

et al. 2020

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Poly(ethylene terephthalate) (PET) materials with different molecular weights were isothermally crystallized from melt by systematically varying the temperature and duration of the treatment performed in the differential scanning calorimeter (DSC). Multiple endotherm peaks were observed on the subsequent heating thermograms that were separated from each other on the basis of their melting temperature versus crystallization temperature and melting temperature versus crystallinity function. By this new approach five sub-peak sets were identified and then comprehensively characterised. Wide-Angle X-Ray Diffraction (WAXD) analyses revealed that the identified sub-peak sets do not differ in crystalline forms. By analysing the crystallinity and the melting temperature of the sub-peak sets as a function of crystallization time, crystallization temperature and intrinsic viscosity, it was concluded that below the crystallization temperature of 460 K the sub-peak sets that were formed during primary or secondary crystallization transform partially or completely to a third sub-peak set during the heating run of the measurement, while above this temperature, the sub-peak set formed during primary crystallization gradually transforms to a more stable structure, with higher melting temperature. These formations and transformations are described with mathematically defined parameters as well.

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“…Polyethylene terephthalate (PET) foam was widely used in the areas of electronic package, solidstate lighting reflective material, and so on. [1][2][3] Due to its excellent properties, including hightemperature dimensional stability, excellent insulation resistance, good chemical resistance, and recyclability, microcellular polyethylene terephthalate (MCPET) foam has attracted more attention from researchers in recent years. However, MCPET foaming was still a challenge because of poor melt strength and slow crystallization rate of PET resin.…”

Section: Introductionmentioning

confidence: 99%

Crystallization-induced microcellular foaming behaviors of chain-extended polyethylene terephthalate

et al. 2020

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The microcellular foaming of chain-extended polyethylene terephthalate (CPET) by crystallization induction method was reported in this article. The crystallization behaviors of various polyethylene terephthalate (PET) samples which were affected by the combined effect of pyromellitic dianhydride, Surlyn, and CO2 were investigated. After Surlyn was added to CPET, the crystal nucleation of various CPET samples was improved, and numerous but small spherulites were generated. Two kinds of CPET samples with the content of 0 phr and 1 phr Surlyn were foamed at various temperature by batch foaming method. Changing the saturation temperature could adjust the appearance of high-temperature melting crystals which would affect the final cellular structures in various CPET foams. With the decrease of saturation temperature, the cell size decreased while cell density increased. At the saturation temperature of 265°C and 250°C, the cell density of CPET foam with Surlyn was one magnitude larger than CPET foam without Surlyn. At the saturation temperature of 247°C, the microcellular PET foams with the cell density of 109 cells cm−3 and the cell size less than 10 µm had been developed successfully.

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Preparation of recycled polyethylene terephthalate composite foams and their feasible evaluation for electronic packages

Cited by 22 publications

References 12 publications

Recent Trends of Foaming in Polymer Processing: A Review

Recent Trends of Foaming in Polymer Processing: A Review

Melting temperature versus crystallinity: new way for identification and analysis of multiple endotherms of poly(ethylene terephthalate)

Crystallization-induced microcellular foaming behaviors of chain-extended polyethylene terephthalate

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