Anti-fungal performance and mechanical-morphological properties of PVC and wood/PVC composites under UV-weathering aging and soil-burial exposure

Journal article

Authors/Editors

NARONGRIT SOMBATSOMPOP

Strategic Research Themes

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Publication Details

Author list: Kositchaiyong A., Rosarpitak V., Hamada H., Sombatsompop N.

Publisher: Elsevier

Publication year: 2014

Journal: International Biodeterioration & Biodegradation (0964-8305)

Volume number: 91

Start page: 128

End page: 137

Number of pages: 10

ISSN: 0964-8305

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84899004487&doi=10.1016%2fj.ibiod.2014.01.022&partnerID=40&md5=0c39e8684ada41762f042bd463cf98c6

Languages: English-Great Britain (EN-GB)

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Abstract

The anti-fungal performance and mechanical-morphological properties of polyvinylchloride (PVC) and wood/polyvinylchloride composites (WPVC) doped with fungicide were studied for the effects of UV-weathering aging (0-32 days) and soil-burial exposure (0-6 months). Hevea brasiliensis Muell (HB) wood was used for producing the WPVC-HB composites and 3-iodopropinyl-N-butylcarbamate (IPBC) was used as a fungicide. Anti-fungal potential was evaluated using the disk diffusion method. It was found that the effects of UV-weathering aging and soil-burial exposure resulted in decreases in the flexural properties and dimensional stability of WPVC-HB composites, but the properties of pure PVC were not affected. Deterioration in the mechanical properties of WPVC-HB by both of the aging effects was slightly diminished by IPBC addition, but the thermal property tended to decrease due to IPBC degradation. FTIR and TGA results showed that UV-weathering had a greater effect on chemical changes of PVC in WPVC composites. Samples UV-aged for 32 days had decreased anti-fungal performance from 81.4 to 28.3%, while the 6-month soil-burial samples decreased from 81.4 to 4.4%. SEM studies showed evidence that addition of IPBC slowed the deterioration of the material properties for both the UV-weathered samples and the soil-burial samples. ฉ 2014 Elsevier Ltd.

Keywords

Anti-fungal evaluation, Fungicide, Soil-burial test, UV-aging, Wood polyvinylchloride composite