共查询到19条相似文献,搜索用时 156 毫秒
1.
《玻璃钢/复合材料》2021,(1)
研究了室温和70℃条件下松香酸酐生物质树脂基体(AGMP3600)在蒸馏水和海水中的吸水性能,通过经典Fick模型模拟了树脂基体的水吸收过程,并与双氰胺固化环氧树脂基体(AP2300)的吸水性能进行了对比,对吸水前后试样的动态力学性能及微观形貌进行了分析。结果表明AGMP3600具有较好的耐水性能,在70℃海水环境中的准平衡吸水率为2.01%,扩散系数为1.77×10~(-6) mm~2/s,AP2300准平衡吸水率为6.60%,扩散系数为0.46×10~(-6) mm~2/s。AGMP3600浇注体储能模量随浸泡时间增加先下降后上升,力学损耗对应的峰值温度(T_g)随浸泡时间增加略有降低;AP2300浇注体随树脂浸泡时间增加,储能模量和玻璃化转变温度T_g都有所下降。由显微金相照片可看出水吸收对AGMP3600树脂微孔破坏程度小,而AP2300树脂由于水吸收率高,微孔孔隙增大、增多。 相似文献
2.
3.
吴飞 《高科技纤维与应用》2011,36(2):39-43
综述了真空辅助树脂转移模塑(VARTM)工艺的树脂体系、工艺过程研究与模拟等的研究进展.表明环氧树脂是VARTM成型工艺的重要树脂基体,双马树脂作为一个重要的基体材料,目前基本处在研究阶段;工艺过程的试验研究和数值模拟发展迅速,国外借助先进技术手段,采用数值模拟方法等对工艺过程进行优化和控制的研究日趋活跃;在航空、船舶... 相似文献
4.
水性环氧树脂制备复合材料的热性能研究 总被引:1,自引:0,他引:1
以水性环氧树脂为基体制备了玻璃布/环氧树脂复合材料,用TG、TG-FTIR研究了复合材料和基体的热性能.结果表明,复合材料基体热降解分为两个阶段,复合材料的最大热失重速率峰值温度比树脂基体的最大热失重速率峰值温度低;热红联用分析表明,基体的降解主要发生在热失重第一阶段.动力学研究表明,树脂基体的表现活化能随分解程度增加逐渐增加. 相似文献
5.
在96℃水中,对开芙拉29(Kevlar29),开芙拉49(Kevlar49)和聚苯撑苯并唑(PBO)纤维束增强的环氧树脂和双马树脂基复合材料进行老化实验后,再在60℃下进行干燥脱水处理。实验测定了吸水和脱水阶段的含水率及热水老化试样和干燥试样的弯曲性能。结果表明:在热水作用下,复合材料的弯曲强度和模量随热水老化时间的延长呈下降趋势,纤维与树脂基体间的界面发生破坏;再干燥脱水后,材料的弯曲强度和模量恢复,但仍低于未老化试样的性能,纤维与树脂基体间的界面破坏情况也类似。 相似文献
6.
7.
8.
为满足塔河油田裂缝封堵要求,分别以丁腈橡胶(NBR)和氢化丁腈橡胶(HNBR)为基体,耐盐型亲水树脂和聚醚型聚氨酯预聚体作为混合吸水剂,加工出遇水膨胀橡胶(WSR),用粉碎机将其破碎成堵剂。研究了物理复合型和反应复合型亲水树脂对WSR的力学性能与吸水膨胀行为的影响,基体对WSR的力学性能和遇水膨胀行为的影响,以及堵剂在塔河矿化水中吸水膨胀性能的规律。结果表明,反应复合型WSR在高矿化水膨胀过程中表现出高膨胀倍率和吸水剂微析出现象。以HNBR为基体的WSR在130℃、2.0×10~5 mg/L塔河矿化水中,表现出较高的体积膨胀倍率。 相似文献
9.
利用深海模拟设备和力学测试设备考察了环氧树脂E51和Me-THPA、T403、593、H256 4种不同类型固化体系的吸水性能和弯曲性能,通过对比常压浸水处理和高静水压处理的环氧树脂性能变化,分析了深海条件下不同固化剂类型对环氧树脂性能影响.结果表明,在吸水性能方面,Me-THPA和T403固化剂高静水压处理试样吸水率低于常压浸水处理的试样,而固化剂593和H256与之相反;在力学性能方面,由于固化剂本身自由体积和极性基团的不同,不同固化剂在深海环境下强度下降不尽相同,Me-THPA和T403固化剂20 MPa高静水压处理试样相对于未处理试样弯曲性能有一定程度的降低,但强于常压浸水处理的试样,而593和H256固化剂在高静水压后弯曲性能弱于常压浸水处理的试样. 相似文献
10.
碳纤维复合材料发动机壳体用高性能树脂基体的研制 总被引:2,自引:1,他引:2
在综合考虑树脂黏度、力学性能、耐热性能的基础上。开发了适用于碳纤维复合材料火箭发动机壳体温法缠绕成型工艺用耐高温和韧性环氧树脂基体。用差示扫描式量热法(DSC)、傅里叶红外光谱FT—IR等分析技术对该韧性树脂基体的固化反应动力学参数、树脂基体固化物的性能和复合材料的性能进行了系统的研究。结果表明,该韧性树脂基体黏度低,适用期长,韧性好,与碳纤维界面粘接强度高,所制得的复合材料火箭发动机壳体纤维强度转化率高。为今后相关方面的研究指明了方向。 相似文献
11.
12.
分别用苯基三甲氧基硅烷(PTMS)和3-缩水甘油醚氧丙基三甲氧基硅烷(KH560)单体对环氧树脂进行了化学改性,通过红外(FT-IR)、核磁(1H NMR)对其化学结构进行了表征。以聚酰胺650为固化剂,用差示扫描量热仪(DSC)研究了固化物的固化动力学。此外还研究了涂膜的热失质量(TGA)、吸水率、附着力等性能。结果表明:苯基三甲氧基硅烷和3-缩水甘油醚氧丙基三甲氧基硅烷接枝上环氧树脂,与纯环氧树脂相比,改性后的树脂具有更好的热稳定性和更低的吸水率。改性环氧树脂固化后形成两面性质不同的涂层,与底材接触的涂层底面保留了环氧树脂原有的附着力,而涂层表面则具有高憎水性,起到防腐等作用。 相似文献
13.
A high‐oil‐absorbing resin, which was a low crosslinking resin, was synthesized by conventional suspension copolymerization in this study. The effects of the monomer ratio, crosslinker, initiator, ratio of water to oil, and defined optimum reaction conditions were studied. The highest oil absorptivity of the resin was about 11.5 g/g in diesel and the oil‐absorption saturation time was 3 days when the best process conditions were as follows: ratio of styrene to ethylene–propylene–diene terpolymer = 40/60 w/w, amount of crosslinker divinylbenzene = 1.0 wt %, amount of benzoyl peroxide = 1.0 wt %; proportion of gelatin to calcium phosphate = 0.2 g/0.1 g, stirring speed = 500 r/min, and proportion of water to oil = 15 : 1. By using such methods as infrared spectroscopy, thermogravimetric analysis, and other methods, we studied the oil‐absorbing resin structure, oil‐absorption rate, oil‐absorption saturation time, and oil‐absorption rate twice. The oil‐absorbing resins were used repeatedly through the extraction of ethanol. The experiment results show little effect on the oil‐absorption properties. The oil‐absorption rate constant was evaluated for diesel, and the oil‐absorbing process obeyed the first‐order kinetics equation. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 相似文献
14.
The mechanical behavior of an epoxy resin (Epon 826) was studied by performing a series of tests on thin‐walled tubular specimens. These tests deal with different aspects of the mechanical behavior of this epoxy resin. The deformation behavior, such as viscoelastic behavior, hydrostatic stress effect, multiaxial behavior and loading path effect, was investigated. It was found that the Epon 826 epoxy resin is a highly nonlinear viscoelastic material. The effect of hydrostatic pressure on the deformation behavior of this epoxy is not significant. However, it shows different tensile and compressive deformation behavior. The loading path was found to have an observable effect on the deformation response of this epoxy, especially in the high stress/strain range. 相似文献
15.
16.
A novel high oil‐absorbing resin, P(EPDM/α‐MSt/ITA), was synthesized by suspension copolymerization with ethylene‐propylene‐diene (EPDM), α‐methylstyrene (α‐MSt), and itaconic acid (ITA) as monomers, benzoyl peroxide as initiator, and divinylbenzene as crosslink agent in this study. By using methods such as infrared spectroscopy, thermogravimetric analysis, and scanning electron microscopy, we studied the oil‐absorbing resin structure, oil‐absorption rate, oil‐absorption saturation time, and submicroscopic structure of oil‐absorption resin after oil absorption. The experiment results show that the highest oil absorptivity of the resin was about 21.9 g/g in diesel oil, obviously increasing the oil absorptive properties by the addition of itaconic acid as reaction monomer. We can draw a conclusion from scanning electron microscopy observation of sample after oil absorption that the oil‐absorption resin was filled with diesel oil, and a kind of morphology structure similar with embossment can be produced during the oil‐absorbing process. The oil‐absorbing resin was used repeatedly through the extraction by ethanol. Experiment result proved to have little effect on oil‐absorption properties. Otherwise, the oil‐absorption rate constant K of novel high oil‐absorbing resin was evaluated for diesel oil, and the oil‐absorbing process obeyed the first‐order kinetics equation. POLYM. ENG. SCI. 2013. © 2012 Society of Plastics Engineers 相似文献
17.
环氧树脂填充体系的吸水性研究 总被引:3,自引:0,他引:3
通过对不同环氧树脂体系的吸水性研究,探索了不同固化剂,不同填料对体系吸水的影响。采用含有较强极性基团固化剂的树脂体系吸水较严重,耐水性较差。填料的加入使体系的吸水速度加快、平衡吸水率增加,其中铝粉的影响较小。填料对体系吸水性的影响主要发生在界面层上。 相似文献
18.