發(fā)布時間：2018-04-15 16:05

  本文選題：形狀記憶環(huán)氧樹脂 + 軟質(zhì)聚氨酯泡沫材料�。� 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：形狀記憶聚合物泡沫(Shape Memory Polymer Foam)具有密度小、質(zhì)量輕、高壓縮率及形狀記憶效應(yīng)的特點(diǎn),使其在生物醫(yī)學(xué)及航空航天領(lǐng)域有極大的應(yīng)用前景。本文以形狀記憶環(huán)氧樹脂為基體,將軟質(zhì)聚氨酯泡沫材料作為輔助發(fā)泡材料制備了一種復(fù)合型形狀記憶環(huán)氧泡沫,并采用DMA、TGA、FTIR及XPS分析測試手段分析對復(fù)合泡沫材料進(jìn)行表征,研究發(fā)現(xiàn)形狀記憶環(huán)氧復(fù)合泡沫材料在固化過程中發(fā)生了SMEP與軟質(zhì)聚氨酯泡沫材料的化學(xué)交聯(lián)反應(yīng)。軟質(zhì)聚氨酯泡沫材料對復(fù)合泡沫的玻璃化轉(zhuǎn)變溫度起到了一定的調(diào)節(jié)作用,隨軟質(zhì)聚氨酯泡沫材料含量降低,復(fù)合泡沫材料Tg升高,儲能模量升高。復(fù)合泡沫材料與原材料相比其分解起始溫度降低,分解終止溫度升高,復(fù)合泡沫可在200℃以下使用。通過SEM及力學(xué)壓縮測試研究復(fù)合形狀記憶環(huán)氧泡沫結(jié)構(gòu)、力學(xué)性能與制備參數(shù)(T/K/模具)的關(guān)系,測試結(jié)果表明制備得到的復(fù)合泡沫為開孔泡沫,泡孔分布較均勻,每個制備參數(shù)均會對泡沫孔徑產(chǎn)生影響,但只有靜置時間T會影響泡孔各向異性及均勻性。復(fù)合泡沫彈性模量在幾到幾百千帕,使用時承力較小,其制備參數(shù)對復(fù)合泡沫彈性模量的影響均可歸結(jié)為泡沫材料泡孔分布及孔徑對材料彈性模量的影響,一般孔徑越大,復(fù)合泡沫材料的彈性模量越小。高溫下形狀記憶環(huán)氧復(fù)合泡沫發(fā)生玻璃化轉(zhuǎn)變,彈性模量明顯降低。最后通過形狀記憶測試及驅(qū)動實(shí)驗(yàn)對復(fù)合泡沫的形狀記憶性能進(jìn)行了表征,發(fā)現(xiàn)通過調(diào)節(jié)制備條件(K/T/發(fā)泡容器)可獲得具有一定壓縮率,良好形狀記憶性能的形狀記憶環(huán)氧復(fù)合泡沫材料。熱驅(qū)動與電驅(qū)動均在約3min左右完成,回復(fù)性能較好。
[Abstract]:Shape Memory Polymer foams have the characteristics of small density, light weight, high compressibility and shape memory effect, which make them have great application prospect in biomedical and aerospace fields.In this paper, a kind of composite shape memory epoxy foam was prepared by using shape memory epoxy resin as matrix and soft polyurethane foam as auxiliary foaming material. The composite foam was characterized by DMA-TGA FTIR and XPS.It was found that the chemical crosslinking reaction between SMEP and soft polyurethane foam occurred during the curing process of shape memory epoxy composite foam.Soft polyurethane foam materials play a certain role in regulating the glass transition temperature of the composite foam. With the decrease of the content of soft polyurethane foam material, the composite foam material TG increases and the storage modulus increases.Compared with the raw materials, the initial decomposition temperature of composite foams is lower, and the decomposition termination temperature is higher. The composite foams can be used below 200 鈩，

本文編號：1754814