本文關(guān)鍵詞： CBT 玻璃纖維 玄武巖纖維 表面處理 復(fù)合材料　出處：《江蘇科技大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：環(huán)形對(duì)苯二甲酸丁二醇酯CBT(Cyclic Butylene Terephthalate)是一種新型樹(shù)脂,它是特殊的大環(huán)寡聚酯結(jié)構(gòu),有粘度低、快速聚合、可熱成型、無(wú)反應(yīng)熱以及無(wú)VOC和釋放物等優(yōu)良性能,并且具有多種成型方法,是可以采用熱固性樹(shù)脂加工方法進(jìn)行加工的熱塑性樹(shù)脂;同時(shí)以由CBT聚合后得到的PCBT(Poly Cyclic Butylene Terephthalate)為基體的熱塑性復(fù)合材料具有較好的抗沖擊性、較高的強(qiáng)度和可回收利用性,作為熱塑性樹(shù)脂界的新星,它在復(fù)合材料領(lǐng)域中有著廣闊的發(fā)展空間。采用熱壓成型法制備玻璃纖維/PCBT復(fù)合材料。研究了玻璃纖維表面處理工藝、催化劑的用量、模壓溫度、模壓壓力、模壓時(shí)長(zhǎng)以及樹(shù)脂和纖維的質(zhì)量比對(duì)復(fù)合材料力學(xué)性能的影響,找出最佳工藝。PCBT的結(jié)晶度和分子量隨催化劑用量的增加先增大后降低,當(dāng)催化劑用量為0.4%wt時(shí),PCBT的結(jié)晶度和分子量最大,同時(shí)復(fù)合材料的力學(xué)性能最優(yōu)。反應(yīng)溫度升高,聚合產(chǎn)物的結(jié)晶度和粘均分子量也逐漸升高并趨向于平穩(wěn),當(dāng)溫度達(dá)到210℃時(shí),聚合產(chǎn)物PCBT的結(jié)晶度和粘均分子量達(dá)到較大值。聚合時(shí)間對(duì)聚合產(chǎn)物的分子量和結(jié)晶度影響不大,但增加模壓時(shí)間,對(duì)復(fù)合材料的彎曲強(qiáng)度有較明顯的提高。經(jīng)過(guò)偶聯(lián)劑處理后,界面結(jié)合力有明顯的提高,復(fù)合材料的力學(xué)性能得到提升。隨著模壓壓力的增大,復(fù)合材料的力學(xué)性能增大,當(dāng)模壓壓力為5MPa時(shí),復(fù)合材料的力學(xué)性能最好。通過(guò)對(duì)不同原料配比條件下的產(chǎn)物力學(xué)性能測(cè)試及掃描電鏡觀察,表明玻璃纖維與CBT比為1:1時(shí),原料結(jié)合性最好,同時(shí)力學(xué)性能較高。采用熱壓成型法制備玄武巖纖維/PCBT復(fù)合材料。探究玄武巖纖維表面處理工藝,研究了偶聯(lián)劑的濃度,模壓溫度、模壓時(shí)長(zhǎng)以及壓力對(duì)復(fù)合材料性能的影響。隨著聚合時(shí)間的加長(zhǎng),產(chǎn)物分子量先增大后趨向平穩(wěn),當(dāng)聚合溫度為210℃,聚合時(shí)間為60min時(shí),PCBT的分子量最大,為最佳聚合條件。模壓壓力的大小對(duì)復(fù)合材料中樹(shù)脂的含量產(chǎn)生重要影響,當(dāng)模壓壓力為4MPa時(shí),復(fù)合材料的力學(xué)性能最優(yōu)。堿刻蝕處理對(duì)玄武巖纖維力學(xué)性能有一定的損耗,但提高了復(fù)合材料的力學(xué)性能。堿刻蝕和偶聯(lián)劑聯(lián)合處理能夠有效提高玄武巖纖維與樹(shù)脂的結(jié)合性,宏觀上提高復(fù)合材料的力學(xué)性能。
[Abstract]:Butanediol terephthalate (CBT(Cyclic Butylene Terephthalate) is a new type of resin. It is a special macrocyclic oligomer with low viscosity, rapid polymerization, thermoforming, no reaction heat and no VOC and release. There are many molding methods, which can be processed by thermosetting resin, and the thermoplastic composite based on PCBT(Poly Cyclic Butylene Terephthalate, which is polymerized by CBT, has good impact resistance. As a new star in the field of thermoplastic resin, it has a wide development space in the field of composite materials. Glass fiber / PCBT composites were prepared by hot pressing method. The surface treatment process of glass fiber was studied. The effects of the amount of catalyst, molding temperature, molding pressure, molding time and the mass ratio of resin to fiber on the mechanical properties of composites were investigated. The crystallinity and molecular weight of PCBT increased first and then decreased with the increase of catalyst dosage. When the amount of catalyst is 0.4wt, the crystallinity and molecular weight of PCBT are the largest, and the mechanical properties of the composites are the best. When the reaction temperature increases, the crystallinity and viscosity average molecular weight of the polymerization products increase and tend to be stable, and when the temperature reaches 210 鈩，

本文編號(hào)：1523547