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J Hazard Mater

Title:		Elevated volatile organic compound emissions from coated thermoplastic polyester elastomer in automotive interior parts: Importance of plastic swelling
Author(s):		Kim HJ; Jeong C; Oh A; Seo YS; Jeon H; Eom Y;
Address:		"Department of Polymer Engineering, Pukyong National University, Busan 48513, Republic of Korea. Surface Treatment Materials Development Team, Material Development Center, Hyundai Motor Company, Hwaseong 18280, Republic of Korea. Interior & Exterior Materials Development Team, Material Development Center, Hyundai Motor Company, Hwaseong 18280, Republic of Korea. Cooperative Laboratory Center, Pukyong National University, Busan 48513, Republic of Korea. Department of Polymer Engineering, Pukyong National University, Busan 48513, Republic of Korea. Electronic address: eomyh@pknu.ac.kr"
Journal Title:		J Hazard Mater
Year:		2023
Volume:		20230922
Issue:
Page Number:		132614 -
DOI:		10.1016/j.jhazmat.2023.132614
ISSN/ISBN:		1873-3336 (Electronic) 0304-3894 (Linking)
Abstract:		"Volatile organic compounds (VOCs) in vehicle cabins pose some health concerns, especially in new cars where interior plastics contribute substantially to VOCs emissions. We investigated the reasons for enhanced VOCs emissions from surface-coated thermoplastic polyester elastomer (TPEE), an automotive interior plastic. After applying solvent-based primer and clearcoat coatings, total VOCs (TVOC) level increased by 12.1 times (2066-24,983 mug m(-3)). Among the 15 emitted VOCs, seven VOCs (esters and ketones) originating from the coating solutions accounted for 77.4 % of TVOC. The remaining solvents resulted from TPEE swelling during coating owing to high chemical affinity with the solvents as evidenced by a low contact angle (14.3 degrees ) and high degree swelling (68.9%). Further baking at 80C reduced VOCs levels over time, but some major compounds (methyl isobutyl ketone and butyl acetate) persisted until 6 h. Primer and clearcoat films reduced solvent volatilization by approximately 70 %, creating a blocking effect. Apart from solvents, neat TPEE contained 4.2 % of its weight as potential VOCs. Therefore, enhanced VOCs emissions stem from three factors: (1) excessive TPEE swelling caused by coating solvents and residual solvents released as VOCs, (2) restricted volatilization caused by the coating, and (3) emission of inherent VOCs from neat TPEE"
Keywords:		Automotive interior plastic Surface coating Swelling Thermoplastic polyester elastomer Volatile organic compound;
Notes:		"PublisherKim, Hyo Jeong Jeong, Chanul Oh, Arom Seo, Yong-Soo Jeon, Hotak Eom, Youngho eng Netherlands 2023/10/01 J Hazard Mater. 2023 Sep 22; 461:132614. doi: 10.1016/j.jhazmat.2023.132614"