共查询到17条相似文献,搜索用时 125 毫秒
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超支化聚合物增韧环氧树脂的研究进展 总被引:6,自引:0,他引:6
介绍超支化聚合物的结构及特点,着重综述了超支化聚合物增韧改性环氧树脂的研究进展,指出了超支化聚合物在环氧树脂改性方面的发展方向。 相似文献
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综述了国内外环氧树脂增韧改性的研究进展。介绍了橡胶类弹性体、热塑性树脂、纳米粒子、液晶聚合物、超支化聚合物、互穿网络结构和柔性链段等增韧改性环氧树脂的研究现状,讨论了单一增韧方法对环氧树脂综合性能的影响及存在的缺陷,展望了未来多种增韧方法协同增韧改性环氧树脂的发展趋势。 相似文献
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超支化环氧树脂的研究进展及应用前景 总被引:3,自引:3,他引:0
综述了各类超支化环氧树脂的合成工艺,主要包括聚酯型、聚醚型、聚酯聚醚型和聚烷烃超支化环氧树脂.超支化环氧树脂的合成工艺主要有缩水甘油直接法、环氧氯丙烷间接法、原子基团转移聚合法、双键加成法.对每种超支化环氧树脂的合成工艺、产品特征进行分析.提出了超支化环氧树脂在热固性材料、胶粘剂和作为无溶剂树脂等领域的应用前景. 相似文献
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增强增韧环氧杂化树脂制备与性能研究 总被引:2,自引:0,他引:2
双酚A型环氧树脂的增韧增强研究是热固性树脂的重要发展方向之一,利用一步法合成了脂肪族端羟基超支化聚合物(HTP-2),再利用"嫁接法"制备了液体型超支化环氧树脂HTPE-2,研究了HTPE-2/双酚A型环氧杂化树脂的力学性能和热学性能.利用红外光谱、扫描电镜、热分析和分子模拟技术讨论了超支化环氧树脂的结构、杂化树脂的性能和原位增韧增强机理.结果显示,杂化树脂的力学性能随超支化环氧树脂含量的增加先提高后下降,具有最大值;当HTPE-2的质量分数为9%~12%时,杂化树脂的拉伸强度、弯曲强度、冲击强度和断裂韧性分别提高18.0%、35.7%、192.4%和39.6%,综合性能较好,但玻璃化转变温度(T8)和热分解温度有所下降. 相似文献
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超支化环氧树脂是以芳香族聚酯聚醚型超支化聚合物(HBP)为骨架合成而得。含有大量环氧端基的HBP具有低黏度、高流变性、不易结晶、高分子质量、高活性、力学性能优异、电性能优良、粘接性很好等特点,不仅能大大降低应用体系的黏度,还有显著的增韧增强功能,被认为是环氧树脂等热固性树脂的综合性能最好的增韧材料,应用领域颇为广泛:可用作环氧树脂、酚醛树脂、聚氨酯、丙烯酸树脂、环硫树脂等的增韧剂、增强剂,有的还可用作稀释剂、消泡剂等。 相似文献
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A novel hybrid linear–hyperbranched poly(butylene adipate) copolymer as an epoxy resin modifier with toughening effect
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Fatemeh Shiravand Laura Ascione Paola Persico Cosimo Carfagna Thatiane Brocks Maria Odila Hilário Cioffi Concetto Puglisi Filippo Samperi Veronica Ambrogi 《Polymer International》2016,65(3):308-319
A study was carried out on the effect of a hybrid linear–hyperbranched poly(butylene adipate) copolymer on the properties of a commercial epoxy resin. First, the synthesis of the hyperbranched systems was optimized. These systems were obtained by reacting linear oligomers with 1,1,1‐tris(hydroxymethyl)propane used as branching agent and varying the reaction times from 16 to 44 h. The synthesized samples were characterized through matrix‐assisted laser desorption ionization time‐of‐flight mass spectrometry, differential scanning calorimetry and thermogravimetric analysis. Results showed that for reaction times of 30 h a highly branched system, namely 5HB30, was obtained. This system was chosen as toughening agent for a commercial high‐performance epoxy resin. A kinetics analysis of epoxy/5HB30 blends indicated that the hyperbranched system had no accelerator or catalytic effect on the crosslinking reaction in the resin. Furthermore, it was demonstrated that 5HB30 acted as an excellent toughening agent, increasing significantly impact resistance up to 90% with respect to neat epoxy resin. The toughness behaviours of epoxy‐based blends were explained by investigating the fracture surface after impact tests through scanning electron microscopy before and after solvent etching. It was observed that the globular‐like hyperbranch‐rich domains, dispersed throughout the continuous epoxy resin, were able to absorb the impact energy without affecting thermal stability. © 2015 Society of Chemical Industry 相似文献
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超支化聚酯型环氧树脂的合成及表征 总被引:10,自引:0,他引:10
用多元酸酐与环氧氯丙烷开环聚合制备了端羟基超支化聚酯,在碱作用下对羟基封端的超支化聚酯进行了闭环反应合成了超支化聚酯型环氧树增,研究了碱及碱的用量对闭环反应的影响,通过DSC考察了超支化聚酯型环氧树脂/邻苯二甲酸酐固化体系的固化行为,计算出固化过程的2个固化反应活化能Ea分别为64 35kJ/mol和91 12kJ/mol,频率因子lnA分别为21 8和26 8。 相似文献
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