Crystallization kinetics of Biodegradable PLLA-PPG Copolymer/Clay

• Main Authors: Ming-Te Wu, 吳明德
• Other Authors: Hsin-Jiant Liu
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/21082676939390878350

碩士 === 萬能科技大學 === 材料科學與工程研究所在職專班 === 101 === This study explores PLLA-PPG copolymers (PPG M ̅n:700, 1000, 2000) adding Montmorillonite (Clay) nano-crystallization behavior of composite mode. Solution method of intercalation modified naimimeng after removal of soil evenly on PLLA-PPG copolymers of polymer substrate. Through FTIR, 1H NMR identification of composite structures and guannengji, DSC (Differential Scanning Calorimeter), POM (Polarizing Optical Microscope) observation of crystal growth patterns, XRD (Wide-Angle X-ray Diffraction) observation of Clay to disperse PLLA-PPG copolymers, SEM (Scanning Electron Microscope) to observe the test piece surface micro-topography. Found that MMT evenly on PLLA-PPG copolymers. According to the experimental data show that after adding Montmorillonite n (growth dimensionality) grow from 3-d and 1-d to 2-d , k (overall crystallization rate) due to add montmorillonite larger (faster crystallization), its Ea requirements reduced. PPG between chain length increases closer to 2-d and Crystal speeds get faster, Its Ea(Energy of Activation) requirements smaller and Tm raised. Because PPG chain length increases after crystal growth space bigger, and make crystal easy to grow.