具難燃機能聚甲基丙烯酸甲酯/改質型黏土奈米複材之製備與性質研究

Preparation And Characterization of Poly(methyl methacrylate)/Modified Clay with Flame-Retardant Functionary

吳悌嘉(Ti-Chia Wu)

指導教授 ： 蔡宗燕

中原大學/理學院/化學研究所/碩士(2015年)

https://doi.org/10.6840/cycu201500778

摘要

摘要
本研究以聚甲基丙烯酸甲酯/天然黏土奈米級複合材料之不同添加方式探討其奈米碳球及改質型黏土對熱性質、機械性質及難燃性質的影響。奈米碳球利用強氧化劑及1,3-dipolar cycloaddition製備成OCNC及NCNC。天然蒙脫土先利用改質劑椰油醯兩性基二丙酸二鈉（Disodium Cocoamphodipropionate, K2），利用離子交換法將天然黏土進行有機化改質，增加其與高分子基材的相容性，而後再改質NCNC於clay-K2中，利用X-ray繞射儀（X-ray Diffractionm, XRD）觀察無機層材之層間距變化，傅立葉轉換紅外線光譜儀（Fourier Transform Infared, FT-IR）鑑定其改質土之有機與無機的官能基，以熱重分析儀（Thermal Gravimetric Analyzer, TGA）分析改質土中改質劑的插層量。
以不同添加方式進行總體聚合法製備成奈米複合材料，以XRD及穿透式電子顯微鏡（Transmission electron microscopy, TEM）觀察其分散性，可知CL120系列之奈米複材皆為插層型態，而CL42則在2 phr有團聚現象。熱性質以P-CL42-K2-NCNC-2.0 phr之熱裂解溫度 (Decomposition temperature, Td)最高提升63.2 °C，自217.6 °C提升至280.8 °C，而玻璃轉移溫度最高提升8.9 °C，自131.4 °C提升至140.3°C。機械性質方面，以P-CL120-K2-NCNC-1.0 phr提升最多，增加1599 MPa，由1746 MPa提升至3345 MPa，巴氏硬度也由62提升至68。難燃性質方面，P-O-CL120-K2-2.0 phr之限氧指數提升6個等級，由限氧指數19提升至限氧指數25。

關鍵字

聚甲基丙烯酸甲酯 ； 難燃機能 ； 改質型黏土

並列摘要

Abstract
Herein the new types of highly flame retardant poly (methyl methacrylate) (PMMA) nanocomposites were investigated by bulk polymerization of methyl methacrylate (MMA) in the presence of organic nano carboncapsule (O-CNC) incorporated modified montmorillonite (MMT(CL120,CL42)). The morphology and modification of clay have been confirmed by X-ray diffraction (XRD), also Fourier Transform Infrared spectroscopy (FT-IR) to identify the functional group in modified clay. The dispersion morphology of clays in the PMMA matrix has been confirmed by XRD and transmission electron microscopy (TEM) analysis. Thermal, and Mechanical properties of PMMA nanocomposites were investigated by using thermal gravimetric analyzer (TGA), dynamics mechanical analyzer (DMA) respectively. From the results, they are observed among all PMMA nanocomposites, PMMA containing organo nano carboncapsule doped CL42 modified cocoamphodipropionate (K2)-2.0phr (P-O-CL42-K2-2.0 phr) achieved the highest thermal stability as comparing to pristine PMMA. The 5% thermal decomposition temperature (T5d) and glass transition temperature (Tg) increased 63.2 °Cand 8.9 °C, respectively. The storage modulus of all PMMA nanocomposites also measured, among all PMMA composites, PMMA containing organo N-methyl pyridine functionalized nano carboncapsule doped CL120 cocoamphodipropionate (K2)-1.0phr (P-CL120-K2-NCNC-1.0 phr) has shown highest storage modulus, that is 1599 MPa increased as compare to pristine PMMA. Flammability properties of PMMA nanocomposites were measured by limiting oxygen index (LOI), CL120 cocoamphodipropionate (K2)-2.0phr (P-O-CL120-K2-2.0 phr) has achieved the LOI value 25.

並列關鍵字

Poly(methyl methacrylate) ； Falme-Retardant Functionary ； Modified clay

參考文獻

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