Abstract
The material utilized for manufacturing artificial dentures should have high-grade mechanical properties in order to resist heavy forces inside the mouth. This study includes investigation of some of the mechanical properties (wear rate resistance, compression strength, and hardness) of the specimens prepared by (hand lay-up) method. The wear behavior experiments were performed on (a pin-on-disk tester) under various factors 5%, 8%, 11%, 14%, 17% weight fraction of orange peel, (10, 15, 20 N) load applied and (5, 10, 15 minutes) sliding time, and analysis these experimentally by using the Taguchi’s experimental design (L9) (MINITAB 16). Tests explicated that the specimens (polymethylmethacrylate - 17% orange peel) composites have the best wear rate resistance, compression strength and hardness shore D (0.040×10-5 cm3/N.mm, 142 MPa, 86 shore D) respectively than other specimens (polymethylmethacrylate - 5%, 8%, 11%, 14% wt. orange peel) and these specimens better than the specimens standard polymethylmethacrylate, which could be attributed to the homogeneous dispersion of orange peel particles in the polymethylmethacrylate resin matrix. The results (signal to noise ratio) showed the factors (17% weight fraction) orange peels, (20 N) load applied, and (5 min) sliding time gives the best wear rate resistance. The results of the analysis of variance showed the sliding time (C) is the essential factor effect on the wear rate resistance followed by (A) weight fraction of orange peels and (B) load applied were less affected on wear behavior rate.
Highlights
The composite polymer is a new composite material consisting of the interconnection of two or more materials whose engineering performance and characteristics better the individual constituents [1]
The polymer can be divided into two classes: thermosetting and thermoplastic resin [2], polymethyl methacrylate is an example of the thermoplastic resin and generally used for the artificial denture
Mohammed et al [8] have studied the effect of different weight fractions (2%, 4%, 6% & 8%) cinnamon filler reinforced with polymethylmethacrylate resin in an impact test, flexural and tensile test
Summary
The composite polymer is a new composite material consisting of the interconnection of two or more materials whose engineering performance and characteristics better the individual constituents [1]. Liu et al [6] evaluated the wear rate and hardness of specimens prepared from polymethylmethacrylate resin with 5%, 10%, 15%, and 20% wt. Mohammed et al [8] have studied the effect of different weight fractions (2%, 4%, 6% & 8%) cinnamon filler reinforced with polymethylmethacrylate resin in an impact test, flexural and tensile test. It can be noted from the results the specimens reinforced with 8% wt. The cinnamon filler gives a better values of flexural strength and tensile strength, but the specimens reinforced with 6% wt cinnamon gives better value of impact strength than other weight fractions
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