PrefaceChapter 1: Polymers and CompositesInvestigation of Thermomechanical and Flammability Behaviors of Hemp/Polypropylene Reinforced Polylactic Acid CompositesEvaluation of the Mechanical and Thermal Characteristics of Polypropylene Composites Reinforced with Benzoylation-Processed Banana Fibre and Sisal FibersImproving Epoxy Resin Performance with Sepiolite and Al2O3- Doped Sepiolite: Flame Retardancy and Thermal StabilityStrengthening and Toughening Simulation Analysis of the Two-Phase Microstructures with Different PatternsChapter 2: Membrane SynthesisEffect of Chemical Cleaning of Hypochlorite Solution on the Properties of Polyethersulfone Blend MembraneImprovement of the Polyvinilydene Fluoride Membrane by Incorporating of Cellulose Nanocrystals as Modifying AgentApplying Box-Behnken Experimental Design for Optimization of Polyurethane Membrane Synthesis from Castor Oil (RicinuscommunisL.) Based on Physical PerformanceChapter 3: Properties and Processing Technologies of Structural Steel and AlloysCooling, Microstructure and Properties of Permanent Steel Mold Cast Wrought AZ80 Alloy with Varying Casting Wall SizesStudy on Technical Properties of Low Yield Strength LY225 Steel Plate for SeismicDesign and Experiment of Cryogenic Steel Used for Liquid Cargo Tank of Carbon Dioxide CarriersDevelopment of 420 MPa Grade High-Performance Steel Plate for Wind PowerResearch on Welding Process and Performance of Prefabricated Girth Welded Joints for Double-Connected Pipes of X80M Pipeline