Optimising formulation on weathering resistance of recycled polypropylene and rubberwood flour composites

Ratanawilai T, . and Homkhiew C, . and Thongruang W, . Optimising formulation on weathering resistance of recycled polypropylene and rubberwood flour composites. pp. 215-226. ISSN 0128-1283

The usage of wood“plastic composites (WPCs) in exterior environments was primarily concerned on long-term durability and weatherability when exposed to natural weathering. Discoloration physical and mechanical properties of WPCs are affected by humidity sunlight and temperature. The properties of WPCs under service conditions were investigated to optimise the mixture ratios of rubberwood flour and recycled polypropylene using D-optimal mixture design. Effects on physical and mechanical properties of components were analysed. Overall composition significantly affected weathering effects on lightness (L) discoloration (”E) hardness flexural strength i.e. modulus of rupture (MOR) and modulus of elasticity (MOE) and maximum strain. L ”E hardness MOR and MOE increased with fraction of rubberwood flour. At long weathering exposure times hardness MOR and MOE decreased. Fraction of maleic anhydride-grafted polypropylene (MAPP) slightly affected L hardness and MOR while increased ultraviolet stabiliser fraction decreased L and ”E but decreased flexural properties. Optimal formulation of WPCs using the Design-Expert software based on minimum lightness and discoloration maximum hardness MOR MOE and strain was 61.9 wt recycled polypropylene 33.9 wt rubberwood flour 3.1 wt MAPP 0.2 wt ultraviolet stabiliser and 1.0 wt lubricant.

Full text available from: Official URL: https://www.frim.gov.my/v1/jtfsonline/jtfs/v29n2/2...

Abstract

The usage of wood“plastic composites (WPCs) in exterior environments was primarily concerned on long-term durability and weatherability when exposed to natural weathering. Discoloration physical and mechanical properties of WPCs are affected by humidity sunlight and temperature. The properties of WPCs under service conditions were investigated to optimise the mixture ratios of rubberwood flour and recycled polypropylene using D-optimal mixture design. Effects on physical and mechanical properties of components were analysed. Overall composition significantly affected weathering effects on lightness (L) discoloration (”E) hardness flexural strength i.e. modulus of rupture (MOR) and modulus of elasticity (MOE) and maximum strain. L ”E hardness MOR and MOE increased with fraction of rubberwood flour. At long weathering exposure times hardness MOR and MOE decreased. Fraction of maleic anhydride-grafted polypropylene (MAPP) slightly affected L hardness and MOR while increased ultraviolet stabiliser fraction decreased L and ”E but decreased flexural properties. Optimal formulation of WPCs using the Design-Expert software based on minimum lightness and discoloration maximum hardness MOR MOE and strain was 61.9 wt recycled polypropylene 33.9 wt rubberwood flour 3.1 wt MAPP 0.2 wt ultraviolet stabiliser and 1.0 wt lubricant.

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Item Type:	Article
AGROVOC Term:	Rubber
AGROVOC Term:	Wood
AGROVOC Term:	Polypropylene
AGROVOC Term:	Discoloration
AGROVOC Term:	Lubricants
AGROVOC Term:	Recycling
AGROVOC Term:	Weathering
AGROVOC Term:	Mechanical properties
AGROVOC Term:	Experimental design
AGROVOC Term:	Statistical analysis
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23234

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