松香改性酚醛树脂的合成

以对－特辛基苯酚和松香及甲醛为主要原料，合成了松香改性酚醛树脂，对合成的各种反应条件进行了研究，并选用了一种理想的合成路线。     

平版胶印油墨用松香改性酚醛树脂的合成研究及其进展

松香改性酚醛树脂在现代平版胶印油墨中有着广泛的应用,是胶印油墨不可缺少的重要原料。介绍了松香改性酚醛树脂的合成工艺及其进展,以及影响其性能的因素。     

松香改性酚醛树脂合成工艺

多年沿用的平版油墨中关键组分松香改性酚醛树脂的生产工艺遇到了球保的挑战,通过配方、工艺等方面的全面改进,创出一条新的合成路线,并使不断开拓的新品种树脂更为受益。     

水溶性油墨用富马酸改性松香树脂的研制

介绍了一种水溶性富马酸改性松香树脂的制备方法，选取了较佳的工艺条件，本产品经国内几家油墨厂使用，结果表明适合水溶性油墨的应用要求。     

高级油墨用松香改性壬基酚醛树脂的合成

采用二步法合成工艺,以壬基酚和松香及甲醛为主要原料,合成了松香改性酚醛树脂。对合成的各种反应条件进行了研究,确定了最佳合成工艺路线。首先用壬基酚和甲醛合成甲阶酚醛缩合物树脂,最佳合成工艺为:反应温度65℃,反应时间6 h;酚醛物质的量比为1∶2.4,然后在氧化锌和醋酸钙复合催化下,用聚合松香和松香混合物改性,聚合松香加入量为10%,反应温度260~270℃,实现了溶解黏度与庚烷容纳度均衡发展。     

油墨用酚醛树脂的化学改性研究

对油墨用(烷基)酚醛树脂的化学改性研究进行了综述.分别讨论了(烷基)酚醛树脂的环氧化改性、松香改性、石油树脂改性及其他含不饱和键的化合物或聚合物改性,主要包括改性原理、改性方法及其应用情况.     

油墨用酚醛树脂的化学改性研究

对油墨用(烷基)酚醛树脂的化学改性研究进行了综述.分别讨论了(烷基)酚醛树脂的环氧化改性、松香改性、石油树脂改性及其他含不饱和键的化合物或聚合物改性,主要包括改性原理、改性方法及其应用情况.     

Preparation and properties of cyanate ester modified by epoxy resin and phenolic resin

Stiff and brittle cyanate ester (CE) resin was modified by copolymerizing it with epoxy resin (ER) and phenolic resin (PR) to improve its toughness and flexibility. The cure process of the modified CE resin was characterized by gel time curves and differential scanning calorimetry curves. The Fourier transform infrared spectra of the modified CE resin showed its chemical structure during the curing process. The mechanical properties, thermal behavior, dielectric properties, and morphology of the modified CE resins were investigated. The results showed that an increase in epoxy and phenolic resins resulted in improved flexibility while maintaining thermal stability. When the mass ratio of CE/ER/PR was 70 : 15 : 15 (w/w), flexural strength and impact strength of the modified CE resin increased from 113.6 MPa and 5.2 kJ/m² to 134.5 MPa and 16.7 kJ/m², respectively. Little of the thermal stabilityand dielectric properties was sacrificed in the modification of the CE. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3150–3156, 2007     

水性油墨用丙烯酸酯树脂的改性研究进展

首先从环保油墨的种类出发,介绍了水性油墨(WI)连接料用水性丙烯酸树脂(WAR)的优缺点;然后从功能单体改性WAR、WAR与其他树脂共聚、改善乳液聚合工艺和加入纳米颗粒等方面,论述了WI用WAR的改性研究;最后对WI的发展前景进行了展望。     

酚醛树脂的复合改性研究进展

综述了酚醛树脂增韧和耐热复合改性的研究进展,分析了各种方法的改性机理及研究现状。包括用橡胶、CNSL、桐油、新型固化剂改性酚醛树脂的韧性,用钼、硼、无机纳米材料、聚酸亚胺改性酚醛树脂的耐热性。并对酚醛树脂复合改性方法的发展前景作出了分析。     

有机硼改性酚醛树脂的合成

以硼酸,苯酚,甲醛为原料,碳酸钠作催化剂合成具有耐高温性能的硼酚醛树脂。通过IR,对这种热固性有机硼改性酚醛树脂的结构进行了表征。树脂的热失重分析结果表明此树脂耐热性优于普通酚醛树脂,所得产物在900℃残留物为76．38％。确定了最佳反应条件为:苯酚:甲醛:硼酸=1:2:0．3(摩尔比),缩合反应温度70-75℃,硼酯化反应温度100-104℃,在控制反血时间下脱水一次。     

煤焦油改性酚醛树脂的合成研究

采用正交试验法,探讨了不同物质的量比、反应时间以及催化剂用量对酚醛树脂性能的影响,并借助红外光谱(FTIR)对生成产物的结构进行分析,热重分析法(TCA)对其热稳定性进行表征.通过对改性后树脂的固含量和残炭率的测定分析,得到了合成树脂的优化条件:n甲醛:n苯酚=1.3:1,反应时间100min,NaoH用量为苯酚质量的1.1%.以煤焦油为改性剂时其改性,并对其固舍量、残炭率、水分及游离酚进行测定,结果表明,加入煤焦油后树脂的品质得到了提高.     

Liquid crystalline epoxy resin modified cyanate ester/epoxy resin systems

Liquid crystalline epoxy resin (LCE) modify cyanate ester/epoxy resin blend systems were studied by scanning electron microscope, polarizing optical microscope, thermogravimetric analyzer, differential scanning calorimetry, thermal mechanical analysis, and rheometers. With the addition of LCE resin, the blends showed both an enhanced curing rate and increased glass transition temperature of cured samples. The phase structures of the blends changed from homogenous to liquid crystalline phase when the content of LCE was increased. At the same time, the mechanical properties were also improved and thermal expansion coefficients were lowed down. The thermal degradation temperatures showed little differences, while the residue char yields were slightly increased with the addition of LCE. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

纳米颗粒改性酚醛树脂用于镁碳砖结合剂的研究

利用纳米粒子对镁碳砖生产用酚醛树脂粘合剂进行了改性。改性树脂常规指标符合镁碳砖结合剂的要求。FE-SEM照片可以看到球形和近球形的纳米颗粒,分散均匀且基本无团聚。制砖实验结果表明,以改性树脂为结合剂能有效地减小显气孔率,增大体积密度且明显提高砖的压缩强度。特别是以TEOS(正硅酸乙酯)和纳米炭黑改性酚醛树脂为结合剂的镁碳砖,经200℃/12h热处理后的常温压缩强度分别提高了38.5%和30.4%,达到了43.94MPa和41.35MPa。砖坯的理化性能检测表明,随处理温度的升高,压缩强度和体积密度越来越小,显气孔率越来越大,200~1100℃各指标变化显著,1100~1550℃各指标没有显著变化,但呈变差趋势。     

Cyanate ester resin modified by phenolic resin containing diphenyl oxide segments with high molecular weight

To obtain modified cyanate ester (CE) with good comprehensive properties and low cost, a novel phenolic resin containing diphenyl oxide (MPF) with high molecular weight was synthesized from diphenyl ether, formaldehyde, methanol and phenol by a two-step process which differed from polyphenylene oxide (PPO) in structure. The curing reaction and properties of the modified 2,2-bis(4-cyanatophenyl) propane (bisphenol-A-based cyanate ester, BADCy) by MPF were investigated. It was found that the curing temperature of the modified CE was lower than that of the unmodified CE. When the ratio of MPF and BADCy was 3:7, the cured resin exhibited low dielectric constant (3.00), low dielectric loss (0.0062) and high impact strength (12.5 kJ/m²), and its T _d5% was 371 °C, being superior to CE in the comprehensive properties. When the content of MPF was above 30 %, MPF/BADCy had poor comprehensive properties. In order to improve MPF/BADCy with high content of MPF, epoxy resin (E51) was added. When the ratio of MPF, BADCy and E51 was 50:50:67, the cured resin exhibited low dielectric constant (2.96), dielectric loss (0.0078) and high impact strength (11.84 kJ/m²), and its T _d5% was 365 °C. Small content of MPF or the combination of E51 and MPF were good for BADCy to improve its comprehensive properties.     

水溶性改性松香树脂的合成与性能研究

松香与马来酸酐进行加成反应生成多羧基化合物,再与季戊四醇发生酯化反应,制得水溶性松香树脂。通过考察反应条件,确定适宜的工艺条件为松香／马来酸酐／季戊四醇为20／4／2,加成反应宜约175℃反应3h;酯化反应宜用0．15％催化剂,约200℃反应2h。     

端羟基聚丁二烯改性氰酸酯体系固化反应动力学

采用示差扫描量热法(DSC)研究了端羟基聚丁二烯(HTPB)改性双酚A型氰酸酯树脂(BADCy)体系的固化反应动力学,根据Arrhenius方程对固化过程动力学参数进行了求解,建立了固化反应动力学模型。结果表明,随着HTPB含量的增大,动态DSC固化反应放热峰向低温方向移动,说明HTPB可以催化固化反应并降低体系的反应温度。纯BADCy和BADCy/15%HTPB体系等温固化符合自催化反应模型。纯BADCy体系以及BADCy/15%HTPB体系的表观反应活化能分别为59.67 kJ/mol、56.91 kJ/mol。