本文關(guān)鍵詞： EP/CTBN共混體系 超臨界CO 橡膠分相 泡孔生長 泡孔形貌　出處：《工程塑料應(yīng)用》2017年04期 　論文類型：期刊論文

【摘要】：研究了液體端羧基丁腈橡膠(CTBN)增韌高分子量環(huán)氧樹脂(EP,牌號CYD 014U)的超臨界二氧化碳(SC CO_2)微孔發(fā)泡及其泡孔結(jié)構(gòu),通過差示掃描量熱(DSC)、動態(tài)熱力學(xué)分析(DMA)和掃描電子顯微鏡(SEM)分別研究了不同含量CTBN共混體系的熱性能、動態(tài)模量、斷面形貌和不同發(fā)泡條件下的泡孔結(jié)構(gòu)。研究發(fā)現(xiàn),當(dāng)CTBN含量從0%增加到30%時,EP/CTBN體系的玻璃化轉(zhuǎn)變溫度持續(xù)下降,其DSC測試結(jié)果從98.44℃下降至81.89℃。SEM觀察斷面和氣體傳質(zhì)發(fā)現(xiàn),CTBN含量增加基體塑化,出現(xiàn)兩相結(jié)構(gòu),體系氣體吸附量增加,解吸附速率加快。CTBN含量為10%~15%時,經(jīng)60℃/12 MPa/72 h氣體飽和以及110℃發(fā)泡10~15 s,泡孔尺寸為1~2μm,泡孔密度為5.60×10~(10)~6.28×10~(10)個/cm~3;隨著發(fā)泡時間增加,泡孔經(jīng)歷成核、生長、聚并三個階段,泡孔尺寸增加,泡孔密度先增后降。
[Abstract]:The high molecular weight epoxy resin (EP) toughened by liquid carboxylic acrylonitrile butadiene rubber (CTBN) was studied. The supercritical carbon dioxide (CYD) supercritical carbon dioxide (SCC) and its foaming structure were studied by differential scanning calorimetry (DSC). Dynamic thermodynamic analysis (DMA) and scanning electron microscopy (SEM) were used to study the thermal properties and dynamic modulus of CTBN blends with different contents. The results show that the glass transition temperature of EPCTBN system decreases continuously when the content of CTBN increases from 0% to 30. The DSC results decreased from 98.44 鈩，

本文編號：1489047