共查询到17条相似文献,搜索用时 109 毫秒
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通过松香(RA)与富马酸(FA)高温下的D-A反应合成了富马海松酸(FPA),并利用碳谱(13CNMR)、电喷雾质谱(ESI-MS)、红外光谱(IR)对其进行了表征;通过FPA与丁二醇二缩水甘油醚(BDGE)、己二醇二缩水甘油醚(HDGE)的酯化反应合成了松香基环氧树脂预聚体(FB、FH),测试了预聚体与固化剂不同配比下固化物的漆膜性能;结果表明,当n活性氢/n环氧基在1.0、1.2时,漆膜的硬度大于HB,附着力小于2级,T-弯试验小于2T,耐冲击强度大于9.8J,耐化学性能良好。 相似文献
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丙烯酸松香环氧树脂预聚体的合成与性能研究 总被引:2,自引:0,他引:2
通过丙烯酸松香与丁二醇二缩水甘油醚酯化反应合成了环氧树脂预聚体。探讨了反应温度、催化剂用量等因素对反应的影响,得到了最佳反应条件:三乙胺质量分数0.03%(以丙烯酸松香质量计),反应温度130℃,反应时间5 h。预聚体的环氧值0.19 mol/100 g,黏度15.7 Pa.s(36℃),酸值(KOH)0.6 mg/g。采用DSC结合FT-IR研究了固化物性能,结果表明,以甲基六氢苯酐(MeHHPA)为固化剂,m(预聚体):m(MeHHPA)=10∶8,固化条件为100℃/2 h+170℃/5 h时,固化物的Tg最高,为37.2℃。 相似文献
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《涂料工业》2017,(9)
以四乙烯五胺(TEPA)作为反应底物,与低相对分子质量的环氧树脂(DER331)和聚乙二醇二缩水甘油醚(PGGE)混合树脂反应,再用单环氧封端剂苯基缩水甘油醚(PGE)和十二至十四烷基缩水甘油醚(AGE)作为复合封端剂进行封端,合成非离子复合型水性环氧固化剂。探究了最佳合成条件,采用红外光谱(FT-IR)对合成的产物进行结构表征,并考察了与水性环氧乳液固化后的涂膜性能。结果表明:最佳合成条件为物料比n(伯胺基)∶n(环氧基)=2.3∶1、初始反应温度65℃、反应时间3 h、复合封端剂的比例n(AGE)∶n(PGE)=3∶7。合成的水性环氧固化剂与水性环氧乳液固化形成的漆膜耐腐蚀性能优越。 相似文献
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选用半胱胺盐酸盐和乙二醇二缩水甘油醚为反应原料,合成了聚(半胱胺-CO-乙二醇二缩水甘油醚),利用红外光谱等对其结构进行了分析表征,采用静态失重法、极化曲线等方法研究了其在氨基磺酸溶液中对Q235碳钢的缓蚀性能,并与十七烯基胺乙基咪唑啉季铵盐进行了缓蚀性能比较,结果表明:聚(半胱胺-CO-乙二醇二缩水甘油醚)是一种混合抑制型缓蚀剂,性能与十七烯基胺乙基咪唑啉季铵盐相当,当合成产物投加浓度为40 mg/L时,Q235碳钢腐蚀速率为0.815 5 g/(m2·h),低于GB/T 25146—2010中规定碳钢腐蚀速率实验室验证结果≤2 g/(m2·h)的控制指标要求。 相似文献
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《热固性树脂》2017,(4)
以漆酚(U)为原料,经环氧化反应制备漆酚缩水甘油醚(UGE),再分别与单宁酸、漆酚和二乙烯三胺反应制备3种改性漆膜。采用红外光谱,凝胶渗透色谱,物理力学性能测试及热重分析研究了单宁酸(T)添加量对单宁酸改性漆酚缩水甘油醚漆膜(T-UGE)性能的影响,当单宁酸添加量为漆酚缩水甘油醚质量的30%时,所制得漆膜的性能最好,硬度可达2H。比较3种漆膜的性能发现:单宁酸改性漆酚缩水甘油醚漆膜(T-UGE)的拉伸强度最为优异,高达11.84 MPa。T-UGE的起始分解温度最高,可达到391.6℃,在426.3℃时失重率最大,为-15.13%/min,即说明T-UGE拥有很好的热稳定性。 相似文献
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以月桂醇和二氯丙醇为原料,在相转移催化剂四丁基硫酸氢铵(TBAHS)存在下合成了月桂基缩水甘油醚,通过测定产品环氧值的方法来计算产品的收率。采用单因素实验和正交试验相结合,考察了原料摩尔比、碱加入量、反应时间和反应温度等对月桂基缩水甘油醚收率的影响,并用1HNMR和IR等对产物结构进行了表征。正交试验极差和方差分析表明,因素影响大小依次为:原料摩尔比碱加入量反应时间反应温度,在优化工艺条件n(二氯丙醇)∶n(月桂醇)=1.2∶1,n(氢氧化钠)∶n(月桂醇)=2.2∶1,50℃下反应4 h,月桂基缩水甘油醚的收率可达81.3%。 相似文献
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The objective of the present work is the development and characterization of siliconized epoxy-phosphorus based bismaleimide coating systems using diglycidylether terminated poly (dimethylsiloxane) (DGTPDMS) and phosphorus-containing bismaleimide (PBMI) as chemical modifiers for epoxy resin. Phosphorus-containing diamine (DOPO-NH2) was synthesized from 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and 4,4′-diaminobenzophenone (DABP), which was utilized in the preparation of phosphorus-containing bismaleimide (PBMI) with maleic anhydride. Siliconized epoxy prepolymer was prepared using epoxy resin and functionally terminated polydimethylsiloxane. The purity and structural conformation of these materials were ascertained from FTIR and NMR spectral studies. The prepared siliconized epoxy prepolymer was blended with varying percentages of PBMI using diaminodiphenylsulfone (DDS) and diaminodiphenylmethane (DDM) as curing agents. The siliconized epoxy and bismaleimide modified epoxy and siliconized epoxy coating materials were characterized by dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC), thermo gravimetric analysis (TGA), heat distortion temperature (HDT) and Limiting oxygen index (LOI). 相似文献
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TDI扩链法制备高相对分子质量聚乳酸 总被引:1,自引:0,他引:1
采用左旋乳酸直接熔融缩聚制得的聚乳酸(PLA)预聚物,熔融后加1,4-丁二醇(BDO)进行酸醇缩合,再加入甲苯-2,4-二异氰酸酯(TDI)进行扩链,研究了酸醇缩合和扩链反应的时间、扩链温度、扩链剂的用量等对PLA相对分子质量(Mη)的影响。结果表明:等摩尔PLA与BDO酸醇缩合2h,再按TDI与PLA预聚物摩尔比为1:1加入扩链剂TDI,在100Pa的真空条件下扩链10min,产物的Mη最为理想;PLA预聚物的Mη越低,扩链后Mη增长的倍数越高。 相似文献
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Tarek Agag Ahmed Akelah Mohamed Abdelwahab Tsutomu Takeichi Hiroyuki Muto 《应用聚合物科学杂志》2010,115(4):2060-2068
Vinylester resin‐clay hybrids were prepared by the mixing different types of organically‐modified montmorillonite (OMMT) with vinylester resin (VER) prepolymer, followed by thermal polymerization. VER prepolymer was synthesized from the reaction of diglycidylether of bisphenol‐A (DGEBA) with acrylic acid. Various types of organic ammonium salts have been used as intercalating agents for montmorillonite, including N,N‐dimethyl‐N‐(4‐vinylbenzyl)stearyl ammonium chloride (VSA), N‐allyl‐N,N‐dimethyl‐stearyl ammonium chloride (ASA) and N,N‐dimethyl‐stearyl ammonium chloride (SA). The dispersion of OMMT into VER matrix was studied by XRD, which indicates the dependence of the morphology mainly on the OMMT content. UV–vis spectra of the hybrids were used to give a quantitative value of the effect of OMMT content on the transparency of VER/OMMT hybrid films. Also, the Vickers test has been performed to study the effect of OMMT content on the surface hardness of the hybrid films. In addition, the thermal properties of the hybrids have been characterized by measuring the softening points and thermogravimetric analyses of the hybrids in comparison with the pure resin. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010 相似文献
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The polymerization kinetics of a monoamine (p-toluidine), a diamine (4,4′-diaminodiphenylmethane) or a mixture of both amines reacted with an epoxy prepolymer, diglycidylether of bisphenol A (DGEBA), was analyzed using differential scanning calorimetry. A simple mechanistic model, consisting of an epoxy-hydroxyl complex formation out of equilibrium, including the possibility that amino hydrogens react with free epoxy groups or with the epoxy-hydroxyl complex, and taking into account the possible difference of the reactivity of amino hydrogens, provided a reasonable fitting of the whole set of experimental results with a lonely set of activation energies. 相似文献