以有機膠奈米模板合成PS/PMMA共聚物之結構與性質研究

Structures and properties of PS/PMMA copolymers prepared using organogels as nano-templates

趙禹昇(Yu-Sheng Chao)

指導教授 ： 賴偉淇

淡江大學/工學院/化學工程與材料工程學系碩士班/碩士(2010年)

https://doi.org/10.6846/TKU.2010.00977

摘要

本研究是利用有機膠奈米模板合成PS/PMMA共聚物之結構與性質研究，利用1,3:2,4-dibenzylidene sorbitol(DBS)作為模版溶於styrene(St)與methyl methacrylate(MMA)單體中，再加入熱起始劑Benzoyl peroxide(BPO)後以60℃進行熱聚合反應合成高分子。經由流變性質分析證實為有機膠且當DBS添加量越多彈性模數也越大，以TEM觀察DBS在不同單體環境下會形成不同型態的奈米細纖維，當St單體較多時奈米纖維會較分散，而當MMA比例越多奈米細纖維會聚集的現象，利用GPC分析可知添加DBS會使共聚物的分子量降低，由TGA與DSC分析可知添加DBS對共聚物的熱裂解溫度沒有影響但Tg會下降，以SEM觀察共聚物的結構可知當樣品比例全為PS時可以發現奈米細纖維被去除的痕跡，但當有PMMA加入時型態變化太大導致無法觀察到奈米細纖維被去除的痕跡。

關鍵字

自組裝 ； DBS ； 奈米細纖維

並列摘要

This research focus on preparation of nanostructured polymeric materials by polymerization at monomers within a scaffold composed of self-assembled 1,3:2,4-Dibenzylidene sorbitol (DBS) nanofibrils. We induce DBS nanofibrils in St-MMA monomers and then thermally initiate the free-radical polymerization of the monomers. The plate rheometer results show that the samples are organogels and elastic modulus will higher at the higher DBS concentration. The TEM results show that the DBS nanofibrils form the different morphology under the different monomers environment. When St monomer more then MMA monomer the nanofibrils will be scattered. When MMA monomer more then St monomer the nanofibrils will be gather. By GPC analysis, we found that adding DBS in polymeric can slightly decrease the molecular weights. The TGA and DSC analysis show that adding DBS in polymeric the decomposition temperature did not variation but the glass transition temperature will slightly decrease. The SEM results show that we can find the sign of DBS nanofibrils wash by alcohol at PS sample but we can not find the sign of DBS nanofibrils wash by alcohol at PS-PMMA and PMMA sample.

並列關鍵字

self-assembled ； DBS ； nanofibrils

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