共查询到18条相似文献,搜索用时 93 毫秒
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四溴邻苯二甲酸酐(简称TBPA)是一种重要的反应型阻燃剂,主要用于聚酯、不饱和聚酯和环氧树脂。TBPA型不饱和聚酯是目前国外主要的阻燃性不饱和聚酯品种之一。同时TBPA又是环氧树脂的阻燃酸酐固化剂。它的溴含量高,其阻燃效果比四氯邻苯二甲酸酐和氯茵酸酐大。TBPA也是一种良好的添加型阻燃剂,可用于不饱和聚酯、聚苯乙烯、聚丙烯、聚乙烯、ABS树脂等。 相似文献
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阻燃PBT工程塑料的研制 总被引:3,自引:0,他引:3
以演化聚苯乙烯、两种溴化碳酸酯齐聚物、溴化环氧树脂4种高分子化合物为阻燃剂,制备玻纤增强阻燃PBT工程塑料,对产品的阻燃性能、力学性能、析出性能、抗紫外世、色相等进行了研究,结果表明部分性能与420SEO性能相当。 相似文献
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溴化环氧树脂是一类特种环氧树脂,具有优异的本质阻燃性能,主要用作电子电器元件的灌装料、防腐剂、粘合剂等材料。溴化环氧树脂阻燃剂是近几年开发出的新型聚合物型溴系阻燃剂之一,具有良好的阻燃性能、粘合性能和热稳定性,毒性低,价格低廉,使用安全,性能平衡性好, 相似文献
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采用高分子型溴系阻燃剂溴化环氧树脂(EP-B)、溴化聚苯乙烯(PS-B)及小分子型溴系阻燃剂十溴二苯乙烷(DBDPE)协同Sb2O3作为卤-锑阻燃体系,研究卤-锑阻燃体系对热塑性聚酯弹性体(TPEE)性能的影响。研究表明,当溴系阻燃剂的质量分数为18%时,均能使TPEE达到UL94 V-0级别,极限氧指数达到27%以上,EP-B,PS-B分别与DBDPE复配使用时的阻燃效果优于EP-B,PS-B单独使用时的阻燃效果;EP-B和PS-B与TPEE具有较好的相容性,两者分别与DBDPE复配时可改善DBDPE与TPEE的相容性;当溴系阻燃剂的质量分数为18%时,EP-B和PS-B分别与DBDPE复配使用,可减少单独使用DBDPE阻燃TPEE力学性能的下降程度;添加阻燃剂改变了TPEE的热失重过程,与EP-B,PS-B阻燃TPEE的残炭率相比,两者分别与DBDPE复配后,阻燃TPEE的残炭率下降约20%。 相似文献
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通过氧指数、力学性能测定及热重分析研究了纳米Sb2O3与十溴二苯醚(FR-10)配合使用时,纳米Sb2O3/环氧树脂复合材料的阻燃性、耐热性和力学性能,并与微米Sb2O3/环氧树脂体系进行了对比。结果表明,Sb2O3与FR-10共用时对环氧树脂具有明显的协同阻燃作用,Sb2O3的加入抑制了环氧树脂固化物的热分解;添加少量的Sb2O3就能达到较好的阻燃效果。加入纳米Sb2O3后材料的拉伸强度、弯曲强度和冲击强度均有提高。添加纳米级Sb2O3时体系阻燃、耐热和力学性能明显好于微米级Sb2O3填充体系。 相似文献
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A phosphorus‐containing epoxy resin, 6‐H‐dibenz[c,e][1,2] oxaphosphorin‐6‐[2,5‐bis(oxiranylmethoxy)phenyl]‐6‐oxide (DOPO epoxy resin), was synthesized and cured with phenolic novolac (Ph Nov), 4,4′‐diaminodiphenylsulfone (DDS), or dicyandiamide (DICY). The reactivity of these three curing agents toward DOPO epoxy resin was found in the order of DICY > DDS > Ph Nov. Thermal stability and the weight loss behavior of the cured polymers were studied by TGA. The phosphorus‐containing epoxy resin showed lower weight loss temperature and higher char yield than that of bisphenol‐A based epoxy resin. The high char yields and limiting oxygen index (LOI) values as well as excellent UL‐94 vertical burn test results of DOPO epoxy resin indicated the flame‐retardant effectiveness of phosphorus‐containing epoxy resins. The DOPO epoxy resin was investigated as a reactive flame‐retardant additive in an electronic encapsulation application. Owing to the rigid structure of DOPO and the pendant P group, the resulting phosphorus‐containing encapsulant exhibited better flame retardancy, higher glass transition temperature, and thermal stability than the regular encapsulant containing a brominated epoxy resin. High LOI value and UL‐94 V‐0 rating could be achieved with a phosphorus content of as low as 1.03% (comparable to bromine content of 7.24%) in the cured epoxy, and no fume and toxic gas emission were observed. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 73: 353–361, 1999 相似文献
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Naoki Yokoyama Yasushi Nonaka Toshiharu Kurata Shunsuke Sakai Shinya Takahashi Tomoyuki Kasemura 《应用聚合物科学杂志》2007,104(3):1702-1713
Morphologies of cured epoxy/brominated‐phenoxy blends were observed by scanning transmission electron microscopy (STEM) and energy dispersive X‐ray fluorescence spectroscopy (EDX). When brominated‐phenoxy content was 30 wt %, cocontinuous phase structures between cured epoxy and brominated‐phenoxy were found. Since every loss tangent (tan δ) curve as a function of temperature on dynamic mechanical analysis (DMA) showed 2 peaks at 128°C and 155°C respectively, cured epoxy phases and brominated‐phenoxy phases were incompatible together and Tgs of cured epoxy phases were not decreased. Tensile strength and tensile elongation of the cured blends were increased together. T‐peel adhesion strength and the lap‐shear adhesion strength were also increased together. These phenomena could be due to the cocontinuous structures consisted by the rigid cured epoxy phases of thermosets and ductile the brominated‐phenoxy phases of thermoplastics. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 1702–1713, 2007 相似文献
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溴化环氧树脂协同三氧化二锑阻燃PBT的性能研究 总被引:1,自引:1,他引:0
采用溴化环氧树脂协同不同粒径的三氧化二锑(Sb2O3)复配制备了阻燃聚对苯二甲酸丁二醇酯(PBT),研究了阻燃PBT的物理力学性能、垂直燃烧性能、阻燃性能和烟气释放情况。结果表明:溴化环氧树脂协同Sb2O3阻燃体系的加入,使得阻燃PBT的熔体流动速率、邵D硬度、弯曲强度和弯曲模量提高,注塑成型收缩率略有增加,维卡软化点略有下降,缺口冲击强度和断裂伸长率明显下降。锥形量热仪的测试结果表明:溴化环氧树脂协同Sb2O3阻燃PBT的燃烧性能显著减低,阻燃级别均可以由UL94HB级提高到UL94V—0级;且Sb2O3粒径越小,阻燃效果越好,当Sb2O3的粒径为0.4μm时,阻燃PBT的综合性能最佳;溴化环氧树脂协同Sb2O3体系在PBT中的阻燃作用明显,但不能抑制烟毒的产生。 相似文献
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用差示扫描量热仪(DSC)、傅立叶交换红外光谱(FT-IR)对不同配比的低溴环氧/氰酸酯树脂的共固化反应机理以及固化物的结构特征进行了研究,同时测定和讨论了其层压板的耐热性和介电性能等。研究结果表明,在低溴环氧/氰酸酯树脂的固化体系中,氰酸酯和环氧树脂通过两种途径反应最终生成噁唑烷酮结构:固化反应温度与体系的组成有关,体系中低溴环氧树脂减少固化反应温度降低:加入催化剂能明显促进体系共固化反应,同时也降低了层压板的耐热性和介电性能。在性能方面,低溴环氧树脂中加入氰酸酯使共固化物耐热性增加、Tg升高,但氰酸酯用量增加到一定范围后,低溴环氧树脂/氰酸酯配比对Tg影响不大;低溴环氧树脂/氰酸酯层压板的耐热性和介电性能在一定实验范围内随着氰酸酯用量的增加明显提高。 相似文献
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Data from techniques such as limiting oxygen index, thermal analysis, scanning electron microscope, heat deformation curve, mechanical properties measurement, etc. show that cured epoxy resin modified by brominated castor oil possesses good flame retardation, toughness, moderate smoke suppression, and some degree of resistance to heat. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 2530–2534, 2002 相似文献
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以聚丙二醇和环氧氯丙烷为原料合成出了低黏度的脂肪族环氧树脂。使用上述环氧树脂与双酚A型环氧树脂按不同的比例混合后,再加入大分子胺类固化剂,由此构筑出环氧树脂固化体系并对其黏度、凝胶时间和固化物的力学性能进行了表征。结果显示,该环氧树脂固化体系在常温下具有很低的黏度与较长的凝胶时间,其固化物的拉伸与弯曲性能较好,且冲击韧性有了明显的改善。 相似文献