共查询到18条相似文献,搜索用时 140 毫秒
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以水性环氧树脂(WEP)为粘料、硬脂酸为赋型剂、甘油为保湿剂制得固体胶棒。采用单因素法考查了配方中主要成分用量对固体胶棒性能的影响。结果表明,当W(WEP)=40%、W(硬脂酸)=8%、W(水)=45%、W(甘油)=7%,m(硬脂酸)∶m(KOH)=6.5∶1,中和反应温度75~80℃时,制得的固体胶棒综合性能最佳。 相似文献
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以水性聚氨酯(WPU)乳液为胶粘剂、硬脂酸钠为赋型剂和甘油为保湿剂等制备固体胶棒。采用单因素试验法优选出制备固体胶棒的较佳工艺条件。结果表明:当w(WPU)=25%~35%、w(赋型剂)=5.5%、w(水)=30%~40%、w(保湿剂)=4%、m(硬脂酸)∶m(NaOH)=6∶1、中和反应时间为30 min、中和反应温度为80~85℃和最终体系的pH值为8~9时,固体胶棒具有赋型性好、涂抹性佳、储存稳定期长、粘接性能强、硬度适中、成本较低且环保等优点,完全满足实际使用要求。 相似文献
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正交实验法用于新型固体胶棒的研究 总被引:2,自引:0,他引:2
介绍了以硬脂酸盐类为凝胶剂,以聚乙烯醇(PVA)改性的聚醋酸乙烯乳液(PVAc)为胶粘剂制备固体胶棒的方法,用正交实验法试验了凝胶剂、胶粘剂、溶剂及保湿剂用量对产品性能的影响,确定了最佳配方和工艺条件。 相似文献
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以固化剂、偶联剂及水泥用量,填料种类及其用量、促进剂及其用量等因素为考察对象,进行正交实验设计,考察了环氧胶黏剂中各组分用量对其剪切粘接强度的影响,并测试了其粘接性能及动态黏弹力学性能,同时进行了傅立叶红外光谱(FTIR)结构表征和热重(TGA)分析。通过粘接性能测试,得到了自制固化剂复配环氧树脂及不同助剂的最优配方:环氧树脂100份、固化剂30份、偶联剂5份、水泥120份、填料10份、促进剂2.8份,该环氧胶黏剂的剪切粘接强度为22.0MPa左右,拉伸强度为12.50MPa左右,冲击强度为9.41kJ/m2。TGA表明:环氧胶黏剂在低于335℃时,热稳定性比较好,保留率为90%以上。DMA测试得到:该胶玻璃化温度Tg为50℃左右。通过探索,混凝土哑铃型试件水中固化环氧胶黏剂的拉伸粘接强度达2.5MPa以上。 相似文献
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Sebahattin Tiryaki Selahattin Bardak Timuçin Bardak 《Journal of Adhesion Science and Technology》2013,27(23):2521-2536
Adhesive bond strength of solid wood plays a key role in the efficient use of wood in a large number of engineering applications. In this study, the effects of amount of adhesive, pressing pressure, and pressing time on bonding strength of beech wood bonded with polyvinyl acetate adhesive were investigated and predicted by developing an artificial neural network (ANN) model. Experimental results have showed that bonding strength of wood samples increased generally by increasing amount of adhesive, pressing pressure, and pressing time. Besides, ANN analysis has yielded highly satisfactory results. The designed neural network model allows predicting the bonding strength of wood samples with mean absolute percentage error of 2.454% and correlation coefficient of 97.8% for testing phase. It is clear from the results that the model has a good learning and generalization ability. This model therefore can be used to predict bonding strength of beech samples bonded with polyvinyl acetate adhesive under given conditions. Consequently, this study provides beneficial insights for practitioners in terms of the safe and efficient use of wood as an engineering material in applications related to the strength of the bond between wood and adhesive. 相似文献
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改性聚乙烯醇缩甲醛生产固体胶棒的研究 总被引:4,自引:2,他引:2
研究了以聚乙烯醇 (PVA)、甲醛、尿素、硬脂酸钠等为主要原料 ,制备固体胶棒的配方及工艺条件。并对其市场前景和经济效益进行了分析。 相似文献
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以MAA(甲基丙烯酸)和PVA(聚乙烯醇)为主要原料,以BPO(过氧化苯甲酰)为引发剂,以乙酸乙酯、丙酮和废弃橙皮精油作为废EPS(聚苯乙烯泡沫塑料)的混合溶剂,制备了清香型废EPS改性胶粘剂。研究结果表明:当混合溶剂中V(乙酸乙酯)∶V(废弃橙皮精油)∶V(丙酮)=5∶3∶2时,其对废EPS的溶解力(8.20 g/10 mL)最强;采用正交试验法优选出制备废EPS改性胶粘剂的最佳工艺条件为w(EPS中MAA)=8%、w(EPS中BPO)=3%、反应温度70℃和w(胶液中PVA)=10.0%,此时改性胶粘剂胶接实木单板的剪切强度可达到0.825 MPa,并且其对织物纤维、纸张等胶接性能良好。 相似文献
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以改性VAE(醋酸乙烯-乙烯共聚物)乳液为木工胶的基体树脂、硼酸为增黏剂、异氰酸酯为交联剂和NaCl为抗冻剂等,成功制备出一种可高周波固化的单组分拼板胶。结果表明:当m(硼酸):m(聚乙烯醇)=0.4:10、w(交联剂)=5%和w(NaCl)=1.0%时,木工胶的综合性能较好,其压缩剪切强度超过欧洲DIN EN 204—2001标准;高周波固化木工胶(不必外加固化剂)的后期性能优于常规加压固化木工胶;该木工胶虽可作为某些中软质板材的拼板胶,但其对西南桦等硬木板材的粘接效果相对较差。 相似文献
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Zhibang Qiao Jiyou Gu Shanshan Lv Jun Cao Haiyan Tan 《Journal of Adhesion Science and Technology》2013,27(13):1368-1381
Utilizing corn starch as a main raw material to prepare starch adhesive, polyvinyl alcohol, borax, and carboxymethyl cellulose (CMC) were added in the preparation process. Because of the poor water resistance of native starch adhesive, an isocyanate prepolymer as a cross-linking agent was synthesized and added to improve its water resistance. Three-layer wood panels were fabricated and bonding strength was measured. The differential scanning calorimeter (DSC), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and energy dispersive X-ray spectroscopy (EDX) were used to characterize the thermal properties, morphology, and element content of samples. Effects of R value (the molar ratio of isocyanate group to hydroxyl group) and CMC addition on the physicochemical properties of starch adhesive were investigated. Thermal analysis results showed prepolymer/starch adhesive (PSA) cured at a relatively low temperature and thermal stability was improved after prepolymer added. SEM, XPS, and EDX results revealed that prepolymer played an effective role in bonding process, and the penetration of adhesive occurred in the wood, resulting in the improvement of bonding strength. 相似文献
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基于膨润土的脲醛树脂填料的开发与性能研究 总被引:4,自引:2,他引:2
比较了面粉、膨润土及其用量对脲醛(UF)树脂胶粘剂的pH值、固含量、固化时间和胶合强度的影响,探讨了膨润土用作胶粘剂填料的可行性。研究结果表明:随着膨润土用量的增加,UF树脂胶粘剂的pH值、固化时间和固含量呈递增趋势,游离甲醛含量明显下降;随着面粉用量的增加,UF树脂胶粘剂的固含量和固化时间呈递增趋势(但增幅比膨润土体系小),pH值有所降低;用添加膨润土的UF树脂胶粘剂生产的胶合板,当w(膨润土)≤20%、施胶量为280~300 g/m2时,胶合板的湿态胶合强度(1.69 MPa)比面粉体系(1.53 MPa)和纯UF树脂胶粘剂体系(1.09 MPa)的高,其湿态胶合强度能达到GB 9 846-1988的标准,而干态胶合强度则远高于GB 9 846-1988标准。 相似文献