Polyethylene 149 Mechanical properties 46 Polypropylene 32 Polyethylene terephthalate 27 Composite materials 25 Testing 20 Polymeric composites 16 Thermoplastics 16 Artificial joints 10 Analysis 8 Materials 8 Recycling 8 Nanocomposites (Materials) 7 Plant fibers 6 Plastics in medicine 6 Reinforced thermoplastics 6 Standards 6 Strenght of materials 6 Thermoplastic composites 6 Bricks 4 Chitin 4 Compression testing 4 Fillers (Materials) 4 Graphite 4 Industrial applications 4 Pipe 4 Polylactic acid 4 Reinforced concrete 4 Ultrahigh molecular weight polyethylene 4 Bentonite 3