| Summary: | 碩士 === 國立臺灣科技大學 === 纖維及高分子工程研究所 === 87 === A series of discussions on silicone rubber, polyurethane and epoxy blends in various ratio for blends structure and reaction in hardened are proposed in this study.The experimental results show that the blends hardened temperature will rise with ncspect to the epoxy content. During the hardening procedure, we found that the head energy would rise with the epoxy content; And in the analysis of structure, would change with various ratio in blends blending, it infers there exists interacted affections between blends products.
In this study, we discuss physical and mechanics properties of liquid silicone rubber, polyurethane and epoxy with various blending ratios. The experimental results show that tensile strength, Young’s modulus and tear strength have proportion relationships with the blending ratios. That is because Polyurethane has better elasticity and epoxy has better rigidness. In addition tensile length increase with the polyurethane content and epoxy content, and has a critical phenomenon at SPE721 blending ratio. Products density have the same phenomenon.. Because the hardness of silicone rubber is between polyurethane and epoxy, so that it shows a proportional relationship with polyurethane and epoxy blending ratios.From blends mechanical property as life and stiffness, we can get that polyurethane is a elastic product basing on the elastic factor and epoxy is a stiffness product. The permanent deformation decreases and the elastic recovery percentage increases with the polyurethane and epoxy blends ratio change. On stiffness, we get hardness has a proportional relationship with stiffness. And with increasing epoxy blend ratio the stiffness will increase too.
In this study, we discuss silicone rubber. Polyurethane and epoxy with various blend ratios by dynamic mechanical analysis on IPN and complementary relation.On Dynamic Mechanical Analysis, there are two damping peak and blends which are partly miscibility at various frequency. From an electron microscope, we found that blend cross-section has micro pellet distribution and rough with increasing content on epoxy. Finally, we get that blends can be formed between intermolecular and self-crosslinking in interpenetrating polymer networks.
In this study, we discuss liquid silicone rubber, polyurethane and epoxy in dynamic mechanical, sluggish effectiveness, anti-vibration and isolated vibration with various blend ratios.The experimental results show that anti-vibration is better by adding content on epoxy, and increase blend ratio can rise blends anti-vibration performance in dynamic mechanical analysis, compression and sluggish effectiveness in shear stress.Estimate on the vibration transmit yield that anti-vibration is better with content on epoxy increase, and anti-vibration and isolated vibration are complementary by blending.
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