本文選題：腰果酚 + 化學(xué)改性　； 參考：《安徽工程大學(xué)》2015年碩士論文

【摘要】：呋喃樹脂在多種樹脂中的混溶性都較好,而且耐存貯。呋喃樹脂經(jīng)過交聯(lián)固化以后,不含有活潑的官能團(tuán),所以一般情況下其與腐蝕介質(zhì)不會發(fā)生反應(yīng),因此,經(jīng)交聯(lián)固化后的呋喃樹脂具有優(yōu)良耐蝕、耐熱及阻燃性能。但是與此同時,呋喃樹脂也存在很多缺陷,例如：沖擊強(qiáng)度低,固化物柔韌性差、脆性大等。除此以外,呋喃樹脂在固化成型的時候,生成的水分會導(dǎo)致樹脂產(chǎn)生收縮及孔洞等問題,而這些問題對呋喃樹脂的應(yīng)用推廣產(chǎn)生了一定的影響。因此,希望研發(fā)出一種既帶有柔性長鏈又帶有活性羥甲基的新型呋喃樹脂添加劑,從而對固化后的呋喃樹脂起到增強(qiáng)增韌的效果。旦些本文設(shè)計出了兩條不同的呋喃樹脂添加劑的合成路線：首先以醛為改性劑,以帶有柔性長鏈及酚羥基結(jié)構(gòu)的腰果酚為母體,利用化學(xué)改性的方法對其進(jìn)行改性,從而制備出帶有柔性長鏈活性羥基的羥(苯)甲基腰果酚及線型腰果酚甲醛樹脂。然后以聚乙二醇及糠醇為原料,利用化學(xué)方法用聚乙二醇對糠醇進(jìn)行改性,制備出中間由聚乙二醇柔性長鏈連接且末端帶有活性糠醇基團(tuán)的聚乙二醇改性糠醇。與此同時,在制備過程考察了加料比、反應(yīng)溫度、反應(yīng)時間等因素對羥(苯)甲基腰果酚、線型腰果酚甲醛樹脂及聚乙二醇改性糠醇制備的影響,最終利用紅外、熱重等對它們進(jìn)行了表征。最后,本次研究將制備出的這一系列新型呋喃樹脂添加劑按照一定比例添加到未固化的呋喃樹脂中,然后經(jīng)交聯(lián)固化制備出可用于相關(guān)測試的改性呋喃樹脂樣條。并且利用紅外對改性呋喃樹脂防腐材料的化學(xué)結(jié)構(gòu)進(jìn)行了表征,利用掃描電鏡對其斷面形貌進(jìn)行了觀察,利用熱重測試儀對其耐高溫性能進(jìn)行測試及分析,利用萬能實驗機(jī)及沖擊實驗機(jī)對其力學(xué)性能及沖擊強(qiáng)度進(jìn)行了測定；最后對其防腐蝕性能進(jìn)行了測定。研究結(jié)果表明：本次研究制備的呋喃樹脂改性添加劑很好地提高了呋喃樹脂防腐材料的韌性及沖擊強(qiáng)度。在合成路線一中,以等摩爾量的甲醛與腰果酚為原料、丁二酸為催化劑,反應(yīng)溫度為125℃、時間為4-5h時,制備的添加劑(線型腰果酚甲醛樹脂)對呋喃樹脂的增強(qiáng)增韌效果最好。當(dāng)該添加劑用量達(dá)25wt%時,改性呋喃樹脂的抗拉強(qiáng)度由原來24MPa提高至33.6MPa,提高幅度達(dá)到40%,斷裂伸長率由以前1.06%提高至4.35%,提高幅度為310%；沖擊強(qiáng)度強(qiáng)度由原來的0.542KJ/m2提高至0.613KJ/m2,提高了13.1%；且樹脂內(nèi)部孔洞明顯減少。在合成路線二中,以糠醇及分子量400的聚乙二醇為原料、鹽酸為催化劑,反應(yīng)溫度為75℃、時間為1h時,制備的添加劑對呋喃樹脂的增強(qiáng)增韌效果最好。當(dāng)該添加劑用量達(dá)25wt%時,拉伸強(qiáng)度最大達(dá)到22.8 MPa,而斷裂伸長率達(dá)到4.21%。并且經(jīng)熱重測試及分析發(fā)現(xiàn),聚乙二醇改性糠醇改性呋喃樹脂耐高溫性能相對于呋喃樹脂稍有減弱；而羥苯甲基腰果酚改性呋喃樹脂及線型腰果酚甲醛樹脂改性呋喃樹脂則在很大程度上提升了呋喃樹脂的耐高溫性能,其中線型腰果酚甲醛樹脂改性呋喃樹脂的耐高溫性能提升最大,使呋喃樹脂的分解溫度由230℃提升到了360℃。本次研究所制備的呋喃樹脂改性添加劑在一定程度上克服了呋喃樹脂防腐材料固化物柔韌性差、脆性大、沖擊強(qiáng)度不高等缺點。最終得到的新型的呋喃樹脂材料,期望能夠在冶金、化工、基建工程、防腐容器等方面作為防腐蝕材料以及結(jié)構(gòu)材料得到廣泛地應(yīng)用。
[Abstract]:Furan resin has better miscibility and storage in a variety of resins. Furan resin has no active functional groups after crosslinking curing, so in general it does not react with corrosion medium. Therefore, the furan resin after crosslinking curing has excellent corrosion resistance, heat resistance and flame retardancy. But at the same time, furan The resin also has many defects, such as low impact strength, poor flexibility and great brittleness. In addition, when furan resin is cured, the generated moisture will cause the shrinkage and hole of the resin, and these problems have a certain effect on the application of furan resin. Therefore, we hope to develop a kind of resin. A new furan resin additive with both flexible long chain and active hydroxymethyl was used to enhance the toughening effect of furan resin after curing. Two different synthetic routes of furan resin additives were designed. First, aldehyde was used as modifier, and cashew phenol with flexible long chain and phenolic hydroxyl structure was used as the mother. It was modified by chemical modification to prepare hydroxybenzyl cashew hydroxybenzol and linear cashew formaldehyde resin with flexible long chain active hydroxyl group. Then polyethylene glycol and furfuryl alcohol were used as raw materials to modify the furfuryl alcohol with polyethylene glycol. At the same time, the effects of feed ratio, reaction temperature, reaction time and other factors on the preparation of hydroxybenzyl cashew, linear cashew formaldehyde resin and polyethylene glycol modified furfuryl alcohol were investigated in the preparation process. Finally, they were characterized by infrared and thermal weight. A series of new furan resin additives were added to the non curing furan resin in a certain proportion, and then the modified furan resin sample was prepared by crosslinking curing. The chemical structure of the modified furan resin anticorrosion material was characterized by infrared and the scanning electron microscope was used. The profile of the section was observed and the thermogravimetric analyzer was used to test and analyze its high temperature resistance. The mechanical properties and impact strength were measured by the universal test machine and the impact test machine. Finally, the corrosion resistance was measured. The results showed that the furan resin was modified by this study. The toughness and impact strength of furan resin anticorrosion materials are improved very well. In the synthetic route one, the additive (line type cashew formaldehyde tree fat) has the best toughening effect on furan resin when the amount of formaldehyde and cashew phenol as the raw material and the diacid as the catalyst, the reaction temperature is 125 C and the time is 4-5h. When the dosage of adding agent is 25wt%, the tensile strength of the modified furan resin is increased from original 24MPa to 33.6MPa, the increase of the tensile strength is 40%, the elongation at break is raised from 1.06% to 4.35%, and the increase is 310%. The strength of the impact strength is increased from the original 0.542KJ/m2 to 0.613KJ/m2, and is increased by 13.1%; and the inner hole of the resin is obviously reduced. The synthetic road is in the synthetic road. Xian Erzhong, with furfuryl alcohol and molecular weight 400 polyethylene glycol as raw material, hydrochloric acid as the catalyst, the reaction temperature is 75, and the time is 1H, the additive has the best strengthening and toughening effect on furan resin. When the dosage of the additive reaches 25wt%, the tensile strength is up to 22.8 MPa, and the elongation at break reaches 4.21%. and is tested by thermogravimetric analysis. It was found that the high temperature resistance of furan modified furan resin modified by polyethylene glycol was slightly weaker than that of furan resin, while hydroxybenzyl cashew modified furan resin and linear cashew formaldehyde resin modified furan resin greatly improved the high temperature resistance of furan resin, in which the furan resin modified by linear cashew formaldehyde resin modified furan resin. The high temperature resistance of the resin has been improved greatly, and the decomposition temperature of furan resin is raised from 230 to 360. The furan resin modifier prepared by this study overcomes the shortcomings of poor flexibility, large brittleness and low impact strength of furan resin anticorrosion material. The new furan resin material is finally obtained. It is expected that it can be widely used as corrosion protection material and structural material in metallurgy, chemical engineering, infrastructure projects, anticorrosive containers and so on.

【學(xué)位授予單位】：安徽工程大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB37

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 周光宇,胡吉,朱美芳,陳彥模,許文菊;PET-PEG共聚物相變性能的研究[J];合成纖維;2005年03期

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本文編號：1800634