利用點擊反應合成主鏈或側鏈含氧代氮代苯併環己烷之聚三唑高分子與性質探討

Abstract

本研究利用點擊化學反應調控位於Polytriazole (PTA) 側鏈之benzoxazine官能基(交聯劑)含量，並進行加熱開環交聯反應產生網狀結構進而提升高分子性質，並探討不同benzoxazine含量對高分子的影響與差異。我們亦使用點擊化學反應合成出benzoxazine於高分子主鏈上之高分子進而與側鏈型高分子做一比較，探討benzoxazine官能基於高分子上位置之不同對高分子的影響與差異。藉由實驗結果得知，側鏈系統之高分子隨著交聯劑於高分子中含量的增加其熱性質與機械性質也會跟著提升，儲存模數最高可提升200%、Tg最高可提升109.3 ℃、應力最高可提升233%、楊氏模數最高可提升260%左右。我們將benzoxazine官能基設計於高分子側鏈交聯後能大幅提升高分子性質，且只需少量之交聯劑即能達到與主鏈高含量交聯劑一樣的提升效果。

A series of linear polytriazole-based (PTA) polymers containing thermally curable benzoxazine unit in the main chain or as side chain was synthesized via click reaction. The structure was confirmed by 1H nuclear magnetic resonance (NMR) and fourier transform infrared (FT-IR) spectroscopy. To better understand the curing kinetics of the main-chain and side-chain type polymers, we performed the differential scanning calorimetry (DSC) measurements to describe the thermodynamics of the curing process by using the Kissinger and Ozawa models to calculate the activation energies of PTA-SBz-10 and PTA-MBz-10. This study describes a cross-linked polymer (Cured-PTA-SBz-10) that exhibit dramatic enhancements in thermal properties (117 % improvement in Tg) and mechanical properties (233 % improvement in tensile strength and 260 % improvement in modulus) to compare with neat polytriazole.