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以三光气和双酚AF为原料,采用界面缩聚法合成双酚AF型聚碳酸酯,得到最佳的聚合条件为:三光气和双酚AF的物质的量之比为1.3∶3,催化剂三乙胺的用量为双酚AF质量的4%,反应温度为35℃,反应时间为60 min。通过傅里叶变换红外吸收光谱、乌氏黏度计、同步热分析仪、热变形/维卡软化温度测试仪及极限氧指数测定仪对制备样品进行了结构和性能表征,结果表明,制备样品为双酚AF型聚碳酸酯,样品的黏均分子量为32000。玻璃化转变温度为164.3℃,热失重5%的温度为440.8℃,热变形温度为149℃、维卡软化温度为157℃,具有较好的耐热性能;极限氧指数为29.5%,具有较好的阻燃性能。样品经碱溶液浸泡后质量损失率较小,耐碱腐蚀性能较好。样品在很多有机溶剂中都有很好的的溶解性。 相似文献
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《合成材料老化与应用》2012,(6):48-49
双酚A是重要的化工原料,是苯酚和丙酮的重要的下游产品。双酚A主要用于生产多种高分子材料,如环氧树脂(ER)、聚碳酸酯(PC)、酚醛树脂、不饱和聚酯树脂、聚砜树脂、聚醚酰亚胺、改性酚醛树脂等。全球双酚A68%用于生产聚碳酸酯,26.5%用于生产环氧树脂,其它产品占5.5%。大部分双酚A生产企业是为其下游产品配套,因此商品量很少。目前我国仅有少量聚碳酸酯生产,90%的双酚A都用于生产环氧树脂,国内基本没有下游配套产品。 相似文献
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《精细与专用化学品》1996,(Z1)
公 司 Chiyoda Corp.应 用 本方法(CT-BISA)系以苯酚和丙酮为原料生产双酚A(BPA)。本方法可生产聚碳酸酯和环氧树脂级双酚A产品。 相似文献
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《化工经济技术信息》2007,(3):11-12
拉动力来自环氧树脂和聚碳酸酯双酚A主要用于生产环氧树脂及聚碳酸酯。而随着全球环氧树脂制造中心加快向中国转移,越来越多的国家纷纷来我国采购环氧树脂,这为中国环氧树脂和双酚A产业带 相似文献
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特种氢化双酚A型环氧树脂合成研究 总被引:1,自引:0,他引:1
氢化双酚A和环氧氯丙烷在催化剂作用下开环反应生成了氯醇醚,而后加碱进行闭环反应,制备了低分子质量氢化双酚A型环氧树脂,再将其进一步与氢化双酚A等进行加聚反应,得到高分子质量环氧树脂。通过对产物的环氧值、力学性能和电性能的测试,研究了环氧氯丙烷用量、碱用量、环化反应温度、时间、溶剂及催化剂对合成反应的影响。结果表明,最佳反应条件为:环氧氯丙烷与醇羟基的物质的量比为3.0~3.5∶1,n(NaOH)∶n(醇羟基)=1∶1.1~1.2,环化反应温度25~30℃、时间4 h,甲苯为溶剂,催化剂为自制EH-10。所得氢化双酚A环氧树脂质量稳定,可替代进口。 相似文献
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Three types of bisphenol S (BS) based epoxy resins prepared by reaction of BS or a mixture of BS and bisphenol A (BA) with an excess of epichlorohydrin in alkaline medium or by thermal treatment of BS with diglycidyl ether of bisphenol A (DGEBA) were analyzed by reversed-phase high-performance liquid chromatography (HPLC). Some components present in the reaction products were identified by analogy with BA based epoxies, combination of semipreparative HPLC with IR and NMR spectroscopy, and derivatization of resins with HCl or NaOH. © 1995 John Wiley & Sons, Inc. 相似文献
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采用臭氧氧化法在动态条件下降解双酚A,考察了臭氧浓度、水样进水流速、pH、双酚A初始浓度及温度对氧化降解双酚A效果的影响,探究了臭氧氧化双酚A的反应机理。结果表明,臭氧对溶于水中的双酚A具有良好的去除效果,在反应条件(臭氧浓度11.04 mg/L、水样进水流速2 mL/min、原水pH=6.83、双酚A初始浓度10 mg/L、温度40℃)下,去除率达86.12%。增加臭氧浓度或适当升高温度可增加臭氧氧化双酚A去除率。pH和进水流速的提高会降低双酚A去除率。偏酸性条件下,臭氧降解双酚A的效果更好。臭氧氧化双酚A反应活化能较低,属于快速反应。臭氧浓度不变,增加双酚A初始浓度会使其去除率减小。臭氧氧化双酚A以臭氧直接氧化为主,同时也存在羟基自由基间接氧化。 相似文献
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以丙氧基化双酚A(D33)、环氧氯丙烷(ECH)和液碱为主要原料,采用两步法工艺合成了丙氧基化双酚A缩水甘油醚(DGEPBA)。考察了原料配比、催化剂用量、反应温度、反应时间等因素对反应的影响。结果表明:开环催化剂三氟化硼-乙醚(BF3-Et2O),质量分数0.1%,D33与ECH的质量比为1∶2.0,反应温度70℃,反应时间2.5h;闭环催化剂苄基三乙基氯化铵质量分数0.2%,D33与NaOH的质量比为1∶2.2,反应温度40℃,反应时间6h时,产物环氧值为0.291eq/100g,产率95.4%,黏度为1180mPa·s。通过FTIR和1H NMR对产物结构进行表征,并将不同质量分数的DEEBAPO掺入到E-51环氧树脂中,与二乙烯三胺(DETA)进行固化,并对其固化物力学性能进行测试。因为DGEPBA的掺入,使得E-51固化物在抗拉伸、抗冲击方面均有明显提高。热失重(TGA)分析表明固化物热稳定性稍有提高,扫描电镜(SEM)显示断裂面为韧性断裂。 相似文献
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Poly(2-methoxycyanurate) of bisphenol F and bisphenol A (PMCBFA) was synthesized and fractionated by a fractional precipitation method. The fractions were characterized by viscometry, osmometry and gel permeation chromatography. The Mark–Houwink–Kuhn–Sakurada (MHKS) parameters were established in four solvents and at four different temperatures. The unperturbed dimensions and their coefficients in different solvents were computed using the Stockmayer–Fixman excluded volume theory. From the solution study it was found that PMCBFA is highly flexible. This may be due to the ether linkage present in the main chain. 相似文献
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The condensation reaction of bisphenol A, melamine, and formaldehyde was investigated by gel permeation chromatography, 13C-NMR-spectroscopy, IR-spectroscopy and elemental analysis. Because of the high reaction rates the condensation could be investigated only in the range of pH 6?10. At pH 6 and 7 the reaction of melamine with formaldehyde is dominating. With increasing pH-value the condensation of bisphenol A with formaldehyde is observed preferably. At pH 10 the condensation results in high molecular products. Cocondensation of melamine and bisphenol A through methylene bridges does not take place. But as a separation of the bisphenol A-formaldehyde condensates from the other condensation products was not possible, the three components may be connected through methylene-ether groups and/or intermolecular hydrogen bridges. 相似文献
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Chlorinated polyesters were synthesized from the following acid di-chlorides: 2,3,5,6-tetrachloro-1,4-terephthaloyl ( I ), 2,3,5,6-tetrachloro-1,4-phenylenediacetyl ( II ), and 2,3,5,6-tetrachloro-1,4-phenylenedi(oxyacetyl) ( III ), and bisphenol A, under phase transfer conditions, using several ammonium and phosphonium salts as catalysts and a biphasic CH2Cl2/NaOH system. The influence of the nature of the catalysts and the reaction times were evaluated by the yields and ηinh of the polyesters. The reactivity of the monomers was I < II < III , due to the smaller influence of the tetrachlorinated ring when there is a spacer group between the aromatic ring and the acid chloride group. 相似文献