Ageing Phenomena in Polymers: A Short Survey

Herzig, A.; Johlitz, Michael; Lion, Alexander

doi:10.1002/9783527803743.ch2_01

Cited by 4 publications

(1 citation statement)

References 44 publications

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“…Many plastic products are used outdoors, so it is of great importance to study their chemical and physical behavior in outdoor environments. Photodegradation is known to cause serious alterations in the physical performance of materials, such as surface yellowing, cracking, embrittlement, and stiffening of the polymer composite [ 15 , 16 ]. Based on the literature on pigments in polymer systems, pigment colorants that absorb UV light could provide a shielding effect against photodegradation [ 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Application of Earth Pigments in Cycloolefin Copolymer: Protection against Combustion and Accelerated Aging in the Full Sunlight Spectrum

et al. 2020

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In this paper, we assess various natural earth pigments as potential colorants and stabilizers for ethylene–norbornene copolymer composites. Several cycloolefin copolymer (COC) composites colored with 2 wt% of a selected pigment were prepared using a two-step mixing method. The aging resistance of the polymer composites was investigated in terms of changes to their mechanical properties, following accelerated aging in the full sunlight spectrum (100, 200, 300, 400, and 500 h). Fourier-transform infrared spectroscopy (FTIR), surface energy measurements, and spectrophotometry were used to assess the color changes, surface defects, and morphology of the composites. Thermogravimetric analysis (TGA) was used to study their thermal stability. The combustion characteristics of the prepared COC composites were evaluated based on the microcombustion calorimetry test (MCC). The application of earth pigments resulted in interesting color changes and a significant improvement in the aging resistance of the COC-filled samples, as evidenced by higher aging factor values and lower carbonyl index parameters compared to the reference (COC). The best results were observed for hematite (HM), gold ochre (GO), and red ochre (RO). In addition, the application of earth pigments, especially iron ochre (IO) and red ochre (RO), in COC contributed to a significant reduction in the heat release rate (HRR) values, indicating improved flame retardancy. This research opens the possibility of producing colorful COC composites with enhanced photostability and reduced flammability for use in polymer applications.

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Section: Introductionmentioning

confidence: 99%

Application of Earth Pigments in Cycloolefin Copolymer: Protection against Combustion and Accelerated Aging in the Full Sunlight Spectrum

et al. 2020

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Understanding the influence of anti‐reversion agent and metal oxide dose on natural rubber–carbon black system

Pal

Satpathi

Bhandary

et al. 2021

Polymer Engineering & Sci

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Sulfidic linkages that are formed during the vulcanization process of natural rubber (NR) are unstable at a higher temperature and can be reversed into conjugated diene. To overcome such issue and to build a compound that is hostile to inversion and with increasing service life, anti‐reversion agent (ARA), for example, N,N′‐4,4′‐diphenylmethyene bismaleimide (BMDM), is added into the formulation. This work explains the conjugation reaction mechanism of conjugated diene and BMDM by means of gas chromatography–mass spectrometry and Fourier transform infrared spectroscopy. The first phase of this study is associated with the change in ARA dosage keeping ZnO dosage the same. It is observed that 5 phr of BMDM and 2 phr ZnO combination (ARA4) shows lowest reversion at 160°C. The modulus value at 300% elongation increased 12% by the incorporation of BMDM as compared to the compound of no BMDM (ARA1). The second part is all about keeping BMDM dosage the same at 5 phr level and varying ZnO phr by 3, 4, and 5. From the overall results, it is observed that at a suitable dosage of BMDM and ZnO (5 phr BMDM and 3 phr ZnO combination [ARA5]), least reversion can be achieved and vulcanizates containing optimized BMDM and ZnO show better retention properties after aerobic aging as compared to ARA1.

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Combination and interaction of ageing parameters on single lap shear adhesive joints

Fevery

Latré

Vandepitte

et al. 2021

International Journal of Adhesion and Adhesives

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Ageing Phenomena in Polymers: A Short Survey

Cited by 4 publications

References 44 publications

Application of Earth Pigments in Cycloolefin Copolymer: Protection against Combustion and Accelerated Aging in the Full Sunlight Spectrum

Application of Earth Pigments in Cycloolefin Copolymer: Protection against Combustion and Accelerated Aging in the Full Sunlight Spectrum

Understanding the influence of anti‐reversion agent and metal oxide dose on natural rubber–carbon black system

Combination and interaction of ageing parameters on single lap shear adhesive joints

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