以總體聚合法製備不同粒徑與改質劑之鎂鋁層狀雙氫氧化合物/壓克力樹脂奈米複材及其各項性質之研究

Preparation and Characterization of PMMA/Various Particle Sizes and Modifiers MgAl LDH Nanocompasites by Bulk Polymerization

簡敘恆(Hsu-Heng Chien)

指導教授 ： 蔡宗燕

中原大學/理學院/化學研究所/碩士(2021年)

https://doi.org/10.6840/cycu202101008

摘要

本研究選用兩種不同構型之介面活性劑作改質劑，分別為間苯二甲酸二甲酯-5-磺酸鈉 (Dimethyly-5-sulfoisophthalate, DMSI) 與椰油醯胺丙基甜菜鹼 (Cocamidopropyl Betaine, CPB) 並以回流法與水熱法製備不同粒徑之改質型無機層材。經總體聚合法製備聚甲基丙烯酸甲酯/改質型無機層材奈米複材，探討不同粒徑與改質劑之改質型無機層材對奈米複材之熱性質、機械性質與光學性質之探討。
利用X光繞射儀觀察無機層材之層間距變化。以傅立葉轉換紅外線光譜儀鑑定改質型無機層材之官能基。藉掃瞄式電子顯微鏡觀察無機層材表面型態，再以熱重分析儀鑑定改質劑於無機層材的插層量。
利用X光繞射儀與穿透式電子顯微鏡鑑定奈米複材分散性。以熱重分析儀檢測熱裂解溫度。以動態機械分析儀檢測玻璃轉換溫度與儲存模數。藉凝膠層析滲透儀檢測PMMA分子量。最後以紫外光-可見光光譜儀檢測光穿透率與折射率。
熱穩定性以P-M-MgAl-DMSI-1phr有最佳之T5d = 266.26 ± 1.8 °C，提升26.12 °C。P-M-MgAl-CPB-1phr有最佳之Tg = 144.20 ± 0.6 °C，提升3.98 °C。機械性質以P-S-MgAl-CPB-2phr有最佳之儲存模數 = 16835 ± 33 MPa，提升62%。可見光穿透度以P-MgAl-CPB為佳，各添加量皆維持88%以上穿透度。折射率則變動不大。

關鍵字

壓克力樹脂 ； 總體聚合法 ； 鎂鋁層狀雙氫氧化合物 ； 奈米複材

並列摘要

In this study, there are two types of modifiers which are dimethyly-5-sulfoisophthalate (DMSI) and cocamidopropyl betaine (CPB). The modified MgAl-LDHs were prepared by reflux method and hydrothermal method to foam three difference particle sizes. Then the PMMA/modified MgAl-LDHs nanocomposites were made by bulk polymerization which applied these six types of modified MgAl-LDH with different loading constant.
The properties of modified MgAl-LDHs are characterized by difference instruments - XRD for the d-spacing, FT-IR for the functional groups, SEM for the morphology of modified MgAl-LDHs and TGA for the thermal stability and intercalant amount.
The properties of PMMA/modified MgAl-LDHs nanocomposites are characterized by difference instruments - XRD and TEM for the dispersibility, TGA for the decomposition temperature, DMA for glass transition temperature and storage modulus, GPC for the molecular weight of PMMA and UV-Vis for light transmittance.
The T5d of P-M-MgAl-DMSI-1phr was increased 26.12 °C from 240.41 °C to 266.26 °C, the Tg of P-M-MgAl-CPB-1phr was increased 3.98 °C from 140.22 °C to 144.20 °C, the storage modulus of P-S-MgAl-CPB-2phr were increased 62% compared to the pure PMMA. The transmittance of 550 nm visible light of PMMA/MgAl-CPB can be kept over 88%. Finally, the reflective index of nanocomposites won’t be change a lot by additions of the modified MgAl-LDHs.

並列關鍵字

PMMA ； Bulk Polymerization ； MgAl LDH ； Nanocompasites

參考文獻

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