การเสื่อมสภาพของวัสดุเชิงประกอบแซนวิชระหว่างพลาสติก และแผ่นไม้ไผ่สานภายใต้สภาพแวดล้อมธรรมชาติ

Chatree Homkhiew; Chainarong Srivabut; Watthanaphon Cheewawuttipong; Surasit Rawangwong; Teerapong Lemkhun

Authors

Chatree Homkhiew Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Srivijaya, Muang, Songkhla 90000, Thailand., Materials Processing Technology Research Unit, Faculty of Engineering, Rajamangala University of Technology Srivijaya, Muang, Songkhla 90000, Thailand.
Chainarong Srivabut Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Srivijaya, Muang, Songkhla 90000, Thailand.
Watthanaphon Cheewawuttipong Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Srivijaya, Muang, Songkhla 90000, Thailand., Materials Processing Technology Research Unit, Faculty of Engineering, Rajamangala University of Technology Srivijaya, Muang, Songkhla 90000, Thailand.
Surasit Rawangwong Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Srivijaya, Muang, Songkhla 90000, Thailand., Materials Processing Technology Research Unit, Faculty of Engineering, Rajamangala University of Technology Srivijaya, Muang, Songkhla 90000, Thailand.
Teerapong Lemkhun Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Srivijaya, Muang, Songkhla 90000, Thailand.

Keywords:

wood-plastic composites, polymer, compression molding, mechanical property, analysis of variance

Abstract

The objective of this research was to analyze the effects of plastic types (polystyrene, polypropylene, and polylactic acid) and woven bamboo patterns (weave pattern and marble pattern) on the mechanical and physical properties of sandwich composites made from plastic and woven bamboo plates, subjected to natural weathering for 6 months. In manufacturing the sandwich composites, the sample panels were compressed using a compression molding machine. From the results of experiment, analysis of variance (ANOVA) indicated that the plastic types significantly (p<0.05) affected modulus of rupture, tensile strength, shear strength, and puncture force, while with the same plastic type and woven bamboo pattern the 2-sample t-test revealed that the sandwich composites showed a significant decrease in mechanical properties (p<0.05). Further, after being subjected to natural weathering for 6 months, the sandwich composites made from polypropylene showed the highest mechanical properties (7.22-16.1 MPa) and those made from polylactic acid exhibited the lowest mechanical properties (2.1-9.1 MPa). The sandwich composites made from plastic and bamboo plates with a weave pattern had significantly higher mechanical properties than those with a marble pattern, both before and after exposure to natural weathering. Finally, considering physical changes, it was revealed that the sandwich composites made from plastic and woven bamboo plates exhibited less surface roughness and fewer cracks than 100% pure plastic after exposure to natural weathering.

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