新型高分子聚乙烯醚胺鏈段矽氧烷偶合劑之合成 與分子複合材料應用

Abstract

新穎性之高分子聚乙烯醚胺鏈段矽氧烷偶合劑(polymeric sol-gel agents, PSA)主要是由低分子量的聚乙烯醚胺鏈段矽氧烷(APTES)所製備出來，其可增進環氧樹酯與黏土奈米複材的物理性質。本研究利用二級胺與環氧樹酯製備出環氧樹酯交聯系統，並進一步與矽氧烷試劑反應成新穎性PSA系統。將先前發明之奈米矽片以grafting to即graftting from兩種方式添加於PSA系統中，可發現PSA與奈米矽片產生溶膠-凝膠反應，進而增進環氧樹酯/矽片奈米複材硬度與熱性質等效能、並以傅里葉轉換紅外光譜與29Si固態核磁共振光譜儀進行鑑定，熱重分析儀、鉛筆硬度測試後端性質。本研究為新式高分子聚乙烯醚胺鏈段矽氧烷偶合劑與矽片形成分子複合材料而有效增進物理性質。 本研究已成功開發一系列新型反應型高分子聚乙烯醚胺鏈段矽氧烷偶合劑 (PSA)。藉溶膠-凝膠法(sol-gel reaction)，可有效與奈米矽片形成共價鍵結，並使奈米矽片均勻分散於基材中。此奈米矽片/環氧樹脂複合材料可有效提升膜材硬度，僅需添加0.7wt% 奈米矽片，硬度即可由F顯著提升至2H。且因奈米矽片有效分散於環氧樹脂基材中，亦不影響膜材透明度性質，膜材穿透度可維持於 87%。於未來此奈米複合材料將可應用於封裝材、包裝材等應用，提升膜材硬度性質。

Polymeric sol-gel agents (PSA) were synthesized from the common sol-gel compounds such as 3-aminopropyltrimethoxysilane (APTES) and the amine/epoxy reaction. The epoxy resin, diglycidyl ether of bisphenol-A (DGEBA), was allowed to react with a diamine and APTES to afford the newly designed PSA. The conventional clay/epoxy nanocomposites were further improved via the in situ PSA reaction into the covalently bonded molecular composites. The previously developed nanoscale silicate platelets were adopted to demonstrate the advanced properties in the epoxies. The structures of PSA were designed to facilitate the in situ sol-gel reaction between clays and APTES by grafting from and grafting to methods. The physical properties such as hardness, transparency, and thermal stability were examined. The molecular level of APTES on silicate clays was characterized by solid-state 29Si-NMR. The advances of the physical properties of the molecular level versus nanoscale dispersed composites were first time evidenced.