本文選題：水性聚氨酯 + γ-氨丙基三乙氧基硅烷�。� 參考：《武漢理工大學》2015年碩士論文

【摘要】：水性聚氨酯(WPU)的力學性能和耐水性具有很大的可調性,調節(jié)軟段的不同種類,WPU可獲得不同的優(yōu)異性能。聚醚作為軟段可制備出耐水解性相對較好的WPU膠膜,聚酯作為軟段可改善其涂膜的外觀平滑和光亮等性能,本論文首先采用預聚體法以聚醚/聚酯為混合軟段成功合成出了混合型WPU乳液;由于其混合型WPU結構設計屬于線型分子鏈段,導致其本身結構構造存在缺陷,為了進一步改善其成膜后的成品的力學性能、耐水性和熱穩(wěn)定性等,以γ-氨丙基三乙氧基硅烷(APTES)為硅烷偶聯(lián)劑和三羥甲基氨基甲烷(TOAM)為交聯(lián)劑來成功制備出硅烷改性水性聚氨酯(PUSi)乳液;最后以聚己二酸-1,4-丁二醇酯二醇(PBA)插層有機蒙脫土(OMMT),再將其與混合型WPU復合,合成出了HPU/OMMT納米復合材料,其材料表現(xiàn)出較佳的力學性能和熱穩(wěn)定性。本論文的主要研究內容如下:(1)研究了軟段鏈中PBA與聚四氫呋喃醚二醇(PTMG)的質量比對乳液的平均粒徑、黏度、Zeta電位、接觸角、吸水率、力學性能和熱穩(wěn)定性等影響;再以PTMG/PBA為混合軟段,研究了R值、DMPA含量和擴鏈劑含量等因素對乳液和膠膜性能的影響。(2)以APTES作為硅烷偶聯(lián)劑和TOAM作為交聯(lián)劑,成功合成出了硅烷改性交聯(lián)型WPU乳液(PUSi);研究了APTES用量對PUSi乳液的粒徑和形貌,PUSi膠膜的耐水性、力學性能和熱性能等的影響。研究發(fā)現(xiàn),APTES加入到WPU預聚體中后,降低了N-H與C=O間的氫鍵化程度,增加了軟硬段間的兼容性,導致25.6°和43.3°處的軟硬段結晶峰消失,PUSi膠膜的玻璃化轉變溫度(Tg)升高。(3)采用十六烷基三甲基溴化銨(CTAB)對鈉基蒙脫土(Na-MMT)進行有機改性,形成了有機蒙脫土(OMMT),以PBA插層OMMT,形成了PBA/OMMT;再以PBA/OMMT作為基料,成功制備出的HPU/OMMT納米復合材料。FTIR分析表明,HPU/OMMT中出現(xiàn)了534cm-1處Al-O伸縮振動峰和467cm-1處Si-O伸縮振動峰,表明已成功合成出HPU/OMMT乳液;WXRD分析表明,當OMMT用量為1%時,PU鏈段已插入到OMMT中,OMMT呈剝離態(tài);當OMMT用量大于5%時,PBA/OMMT會在HPU乳液中發(fā)生沉積。DSC曲線表明,PBA/OMMT與HPU形成懸掛鏈,提高了軟硬段兼容性,導致軟硬段熔融溫度下降;OMMT的加入會導致分子鏈的運動受阻,主鏈的柔順性變差,復合材料的Tg升高。
[Abstract]:The mechanical properties and water resistance of waterborne polyurethane (WPU) have great tunability, and different kinds of soft segments can be adjusted. WPU can obtain different excellent properties. Polyether can be used as soft segment to prepare WPU film with relatively good hydrolysis resistance. As a soft segment, polyesters can improve the exterior smooth and bright properties of the film. The prepolymerization of this paper is first used in this paper. The hybrid WPU emulsion was successfully synthesized with polyether / polyester as a mixed soft segment. Because its hybrid WPU structure was designed to be a linear molecular chain, its structure and structure existed defects. In order to further improve the mechanical properties, water resistance and thermal stability of the finished product, gamma propyl triethoxyl silane (APTES) was used to improve its mechanical properties. Silane coupling agent and three hydroxymethyl amino methane (TOAM) were used as crosslinker to prepare silane modified waterborne polyurethane (PUSi) emulsion. Finally, polydiol -1,4- butanediol diol (PBA) intercalated organic montmorillonite (OMMT) was used to compounded it with mixed WPU and formed a HPU/OMMT nanocomposite. The material showed better force. The main contents of this thesis are as follows: (1) the effects of mass ratio of PBA and polytetrahydrofuran ether glycol (PTMG) in soft segment chain on the average particle size, viscosity, Zeta potential, contact angle, water absorption, mechanical properties and thermal stability of the emulsion were studied. The R value, DMPA content and chain expansion were studied with PTMG/PBA as a mixed soft segment. The effect of agent content on the properties of emulsion and film. (2) APTES as silane coupling agent and TOAM as crosslinker, a silane modified intercourse WPU emulsion (PUSi) was successfully synthesized. The effect of APTES dosage on the particle size and morphology of PUSi emulsion, the water resistance, mechanical properties and thermal properties of the PUSi adhesive film were studied. The study found that APTES was added to the emulsion. After the WPU prepolymer, the degree of hydrogen bonding between N-H and C=O was reduced, the compatibility between the soft and hard segments was increased, the crystallization peak of the soft and hard segments at 25.6 and 43.3 degrees disappeared and the glass transition temperature (Tg) of the PUSi film increased. (3) the organic modification was made with sixteen alkyl three methyl ammonium bromide (CTAB) to the sodium base montmorillonite (Na-MMT) and formed organic matter. Montmorillonite (OMMT), PBA/OMMT was formed with PBA intercalated OMMT, and then PBA/OMMT was used as the base material. The.FTIR analysis of the HPU/OMMT nanocomposite prepared successfully showed that the Al-O expansion vibration peak of 534cm-1 and the Si-O expansion vibration peak at 534cm-1 were found in HPU/OMMT, which showed that the emulsion had been successfully synthesized. The PU segment has been inserted into OMMT and OMMT is stripped. When the OMMT dosage is more than 5%, PBA/OMMT will deposit.DSC curves in HPU emulsion indicating that PBA/OMMT and HPU form a suspension chain, which improves the compatibility of the soft and hard segments and leads to the melting temperature of the soft and hard segments, and the addition of OMMT will lead to the resistance of the molecular chain, the flexibility of the main chain, and the composite material. The Tg of the material increases.

【學位授予單位】：武漢理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ317;TB33

【參考文獻】

相關期刊論文 前10條

1 Zerrin Altιntas;Emrah akmakι;M.Vezir Kahraman;Nilhan Kayaman-Apohan;;Thioether Functional Chain Extender for Thermoplastic Polyurethanes[J];Chinese Journal of Polymer Science;2015年06期

2 蘇嘉輝;黃偉;楊雪嬌;陳穎茵;羅青宏;劉曉暄;;多官能度聚氨酯丙烯酸酯水性UV樹脂的合成與性能表征[J];高分子材料科學與工程;2015年01期

3 任龍芳;郭子東;王學川;;PAMAM型樹枝狀水性聚氨酯的合成及表征[J];功能材料;2015年01期

4 解芝茜;王繼印;陶燦;楊明娣;黃毅萍;許戈文;;水性聚氨酯熒光材料的制備及其熒光性能[J];功能高分子學報;2014年04期

5 石陽陽;宋海峰;鮑俊杰;許戈文;黃毅萍;;插層型高嶺土/水性聚氨酯復合材料的制備與表征[J];中國皮革;2014年21期

6 宮濤;;環(huán)氧樹脂改性水性聚氨酯膠粘劑的性能研究[J];化工新型材料;2014年07期

7 李釗;董朝紅;呂洲;朱平;;聚酯-聚醚混合型水性聚氨酯的合成工藝研究[J];聚氨酯工業(yè);2013年02期

8 蔣利華;趙永麗;倪忠斌;陳明清;;納米SiO_2表面改性及其在WPUA中的應用研究[J];應用化工;2013年02期

9 沈泉錦;王貴友;胡春圃;;脂肪族聚氨酯彈性體/蒙脫土復合材料的制備與性能[J];高分子材料科學與工程;2013年02期

10 陳朋;許戈文;黃毅萍;;葡萄糖改性水性聚氨酯[J];聚氨酯;2013年02期

相關碩士學位論文 前5條

1 楊菲菲;IPDI型高固含量水性聚氨酯的合成及應用[D];陜西科技大學;2014年

2 賈妮;封閉型水性聚氨酯的制備及應用研究[D];武漢理工大學;2013年

3 鄧威;聚酯—聚醚混合型內交聯(lián)水性聚氨酯膠粘劑研究[D];華南理工大學;2012年

4 王耀;改性聚氨酯乳液的合成[D];大連海事大學;2009年

5 盧偉紅;樹枝狀聚氨酯丙烯酸酯的合成與應用[D];湖南大學;2006年

，

本文編號：1809692