聚己內酯/環氧樹脂摻合物相行為之研究

Abstract

聚己內酯/環氧樹脂摻合物相行為之研究 學生：謝 美 雲 指導教授：張 豐 志 教授 國立交通大學應用化學研究所碩士班 摘 要 本研究使用光學顯微鏡（OM）及掃描式電子顯微鏡（SEM）及偏光顯微鏡（POM）來探討一系列結構相近的硬化劑（EDA、DETA、TETA、TEPA、PEHA）與PCL/Epoxy摻合物反應後，其相分離程序及分相機構。對於判斷摻合物中有無酯交換反應，利用紅外線光譜儀（FT-IR）、凝膠色層分析儀（GPC）來分析。而起始分相轉化率則藉由微分示差掃描儀（DSC）恆溫動力學參數求得。 由光學顯微鏡（OM）可觀測一系列不同的分相機構如PCL之NG機構、PCL之SD機構、環氧樹脂之SD機構乃至於環氧樹脂之NG機構，並且配合偏光顯微鏡（POM）來鑑定不同的相組成。而細微的次分相結構則可藉由掃描式電子顯微鏡（SEM）來觀察。微分示差掃描儀（DSC）動力學分析的輔助可以說明相分離行為的趨動力除了分子量外，交聯結構也扮演著重要的因素。PCL-DETA-Epoxy摻合物系統推測屬於UCST行為，而其相圖隨著溫度提高有向右偏移的現象。

Phase Behavior in Poly(ε-caprolactone)-Epoxy Blends Student: Mei-Yun Hsieh Advisors: Dr. Feng Chih Chang Institute of Applied Chemistry College of Science National Chiao Tung University ABSTRACT Optical microscopy (OM), scanning electron microscopy (SEM), and polarized optical microscopy (POM) have been used to analyze the phase separation behavior and mechanism of the PCL modified epoxy resins. Five similar amine chemical structures (EDA, DETA, TETA, TEPA, PEHA) are used as curing agents. The side reaction between PCL and epoxy/amine blend system is analyzed by Fourier Transform Infrared Spectroscopy (FT-IR) and Gel Permeation Chromatography (GPC). The extend of reaction at the initial phase separation is determined by the kinetic parameters based on DSC isothermal kinetical method. A series of different phase separation mechanisms are observed by optical microscopy (OM), such as NG of PCL, SD of PCL, SD of epoxy and even NG of epoxy. The polarized optical microscopy (POM) is used to determine component phases. A more detailed structure, such as secondary phase separation, is analyzed by the scanning electron microscopy (SEM). Kinetic result from DSC reveal that the driving force of phase separation is come from the increase of the epoxy molecular weight and the crosslinking structure. The PCL/DETA/Epoxy blend is an UCST system.