View in EDS

Comparison of oil resistance and adhesion durability between polysulfide sealant and polyurethane sealant.

Saved in:
Bibliographic Details
Title: Comparison of oil resistance and adhesion durability between polysulfide sealant and polyurethane sealant.
Authors: Lee, Donghyeon1 (AUTHOR), Kim, Jong-Hyun2 (AUTHOR), Yang, Seong Baek2 (AUTHOR), Kwon, Dong-Jun1,2 (AUTHOR) djkwon@gnu.ac.kr
Source: Journal of Industrial & Engineering Chemistry. May2026, Vol. 157, p93-103. 11p.
Subjects: Polyurethane elastomers, Polysulfides, Fractography, Tensile strength, Thermal properties, Chemical resistance
Abstract: [Display omitted] Sealants are widely used in structural applications requiring mechanical strength and environmental resistance. This study compares the thermal, mechanical, and oil resistance properties of polyurethane (PU) and polysulfide (PSF) sealants. PU exhibits high tensile strength and adhesion due to strong hydrogen bonding, while PSF shows higher elongation but poor adhesion. Fractographic analysis reveals brittle failure in PU and ductile features in PSF. Upon kerosene immersion, PU undergoes severe swelling and a drastic reduction in lap shear strength (84.6 %), whereas PSF shows minor surface adsorption and lower degradation (22.3 %). PSF offers excellent oil resistance, its limited adhesion restricts structural use. PU shows superior mechanical performance but poor oil resistance. PU sealants require modification through crosslinking, incorporation of hydrophobic additives, or surface treatment to overcome this trade-off. These results highlight the need for a hybrid approach that combines mechanical advantages of PU with chemical resistance of PSF for high-performance sealants in harsh environments. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Industrial & Engineering Chemistry is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:[Display omitted] Sealants are widely used in structural applications requiring mechanical strength and environmental resistance. This study compares the thermal, mechanical, and oil resistance properties of polyurethane (PU) and polysulfide (PSF) sealants. PU exhibits high tensile strength and adhesion due to strong hydrogen bonding, while PSF shows higher elongation but poor adhesion. Fractographic analysis reveals brittle failure in PU and ductile features in PSF. Upon kerosene immersion, PU undergoes severe swelling and a drastic reduction in lap shear strength (84.6 %), whereas PSF shows minor surface adsorption and lower degradation (22.3 %). PSF offers excellent oil resistance, its limited adhesion restricts structural use. PU shows superior mechanical performance but poor oil resistance. PU sealants require modification through crosslinking, incorporation of hydrophobic additives, or surface treatment to overcome this trade-off. These results highlight the need for a hybrid approach that combines mechanical advantages of PU with chemical resistance of PSF for high-performance sealants in harsh environments. [ABSTRACT FROM AUTHOR]
ISSN:1226086X
DOI:10.1016/j.jiec.2025.09.041