To study relation of molecular structural changing between polypropylene microcomposite system and the particle fillers with varies phase interactions by using solid-state NMR(ssNMR) the molecular flexibility on mechanical properties of materials. | 1 PREFACE 1. Urgency of the thesis Reinforcement of thermoplastic by using particle has studied in few decades ago. Until now it plays an important role in as well 1 . The flexibility of thermoplastic composite materials expands the scope of application in the life and research field. When the materials are reinforced by fillers their properties are changed. Typically the filler impacts in hardness thermal conductivity thermal expansion. However they improve strength and elasticity as well because of the filler properties and the changing of morphology matrix. The inorganic filler are used wide in thermoplastic such as CaCO3 talc SiO2 mice and Mg OH 2. Most of the researches carried paying attention on the factors such as i component ii shape and size iii composition iv compatibility of matrix and filler. Some of them showed a polymer layer locating aninteraction phase between filler surface and matrix which have special property. However the role influenceand a parameters relationship ofthe phase interaction betweenthe filler and the matrix on the mechanical properties . tensile strength impact resistance is not determined clearly. Thus supervisor and PhD student carried on a thesis Effect of surface fillers modification on phase interaction and mechanical properties of thermoplastic materials 2. The aim of thesis To study relation of molecular structural changing between polypropylene microcomposite system and the particle fillers with varies phase interactions by using solid-state NMR ss- NMR emphasizing the molecular flexibility on mechanical properties of materials. 3. Main contents of thesis a. Preparing polypropylene composites materials by using the filler was modified unmodified surface at varies contents. b. Research phase interaction morphology determine the mechanical properties of materials including tensile strength and impact resistance integral J . c. Application of solid-state nuclear magnetic resonance ss-NMR method to .
