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| Indoors and Outdoors Aging Behavior and Correlation Research of ABS in Humid and Hot Marine Atmospheric Environment |
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| DOI：10.7643/issn.1672-9242.2022.05.015 |
| KeyWord:ABS humid and hot marine atmospheric environment aging multi-factor cyclic accelerated aging correlation Principal Component Analysis (PCA) |
| Author | Institution |
| XIONG Jun |
Chengdu Aircraft Industrial Group Co., Ltd., Chengdu, , China |
| WU De-quan |
Southwest Institute of Technology and Engineering, Chongqing , China |
| WANG Chang-peng |
Southwest Institute of Technology and Engineering, Chongqing , China |
| LIU Chang-peng |
Southwest Institute of Technology and Engineering, Chongqing , China |
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| Abstract: |
| This paper is to study the aging behavior and its correlation between the ABS (Acrylonitrile-Butadiene-Styrene) of three monomers, that is, acrylonitrile, butadiene, and styrene, indoors and outdoors in a humid and hot marine atmospheric environment. Humid and hot marine atmospheric exposure (outdoor) tests and multi-factor cyclic accelerated aging (indoor) tests were conducted to qualitatively explore the indoor and outdoor aging behavior law of ABS through properties changes such as appearance, morphology, mechanics, and chemical structure, etc. and to quantitatively explore the correlation between indoor and outdoor aging behavior of ABS through Gray Relation Degree and Principal Component Analysis (PCA). ABS yellow index and other indicators related to surface properties basically reach saturation values of 50 and 45 after 6 months of outdoor exposure and 300 h of indoor accelerated aging; while tensile strength related to overall properties first decreases and then increases during aging, and indicators such as elongation at break, impact strength, and notched impact strength, etc. decrease rapidly by nearly 60% after 2 months of outdoor exposure or 200 h of indoor aging, and then slowly decrease. The change is smooth during the environmental test; the double bond of the butadiene monomer in the molecular chain or the quaternary carbon in the side chain of the benzene ring is decomposed to produce ketones and hydroxyl groups by the action of the environment such as photo-oxygenated water. A variety of ABS properties indicators were combined into a comprehensive aging indicator through PCA to objectively and quantitatively evaluate the Gray Relation Degree of ABS indoor and outdoor aging up to 0.93. ABS aging is a dynamic competitive process of molecular chain breaking and cross-linking, and the correlation between indoor and outdoor aging behavior in humid and hot marine atmospheric environment is high. |
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