双酚A苯并恶嗪一环氧树脂基印制电路基板的研究

采用双酚A苯并恶嗪与环氧树脂共混改性制得胶液,经浸渍玻璃布、烘焙、压制得到了一系列玻璃布覆铜板基板其中含溴型基板的玻璃化转变温度为145.2℃,加强耐热性在300s以上,常温下表面电阻率和体积电阻率分别为1.51×1014Ω、5 75×1014Ω@m,无溴型基板玻璃化转变温度为160.3 ℃,加强耐热性在300 s以上.常温下表面电阻率和体积电阻率分别为1.91×1013Ω、5.01×1013Ω@m,覆铜板的耐浸焊性能优异,达到60s以上     

苯并噁嗪改性二苯醚玻璃布层压板的制备及性能

本文介绍了一种改性二苯醚树脂的合成及其玻璃布层压板的制备方法,并对其性能进行了全面测试.实验结果表明,采用苯并噁嗪改性二苯醚树脂制备的玻璃布层压板,其工艺性优于苯酚改性二苯醚树脂,且成本较低.用作H级绝缘材料,市场前景广阔.     

Preparation and application of polybenzoxazine adsorption resin

The synthesis and application of polybenzoxazine adsorption resin was studied. First, the precursor was synthesized by the solventless method. And then a kind of spherical and granular polybenzoxazine resin was obtained using reverse‐phase suspension polymerization technique in the process of solidification. Besides, the influence of dispersion medium, the volume ratio of precursor to medium, the solidification temperature, and the agitation speed were studied in detail in the process of polymerization. Second, the spherical shape of the polybenzoxazine resin was identified by scanning electronic microscope and the thermal stability of resin was measured by thermogravimetric analysis. Finally, the adsorption capacity of the spherical resin on pyridine was studied in cyclohexane systems. The correlation coefficient of Langmuir adsorption constant temperature line was bigger than 0.99, which indicated that the equilibrium sorption date was coincident with the Langmuir isotherm equation. And the saturated adsorptive capacity of dried resin achieved 222.2 mg g^?1. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

The kinetics of B‐a and P‐a type copolybenzoxazine via the ring opening process

The structure of benzoxazines is similar to that of phenolic resin through thermal self‐curing of the heterocyclic ring opening reaction that neither requires catalyst nor releases any condensation byproduct. These polybenzoxazine resins have several outstanding properties such as high thermal stability and high glass transition temperature. To better understand the curing kinetics of this copolybenzoxazine thermosetting resin, dynamic and isothermal differential scanning calorimetry measurements were performed. Three models, the Kissinger method, the Flynn–Wall–Osawa method, and the Kamal method, were used to describe the curing process. Dynamic kinetic activation energies based on Kissinger and Flynn–Wall–Osawa methods are 72.11 and 84.06 KJ/mol, respectively. The Kamal method based on an autocatalytic model results in a total order of reaction between 2.66 and 3.03, depending on curing temperature. Its activation energy and Arrhenius preexponential are 50.3 KJ/mol and 7959, respectively. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 95: 730–737, 2005     

Side-chain type benzoxazine-functional cellulose via click chemistry

A side-chain type benzoxazine-functional cellulose has been developed using click chemistry via the reaction of ethynyl-monofunctional benzoxazine monomer and azide-functional cellulose. The synthesis, crosslinking, and thermal properties of the benzoxazine-functional cellulose are studied by NMR, FTIR, DSC, and TGA. The crosslinking reaction of the benzoxazine side-chain unusually takes place at low-temperatures in comparison to an ordinary benzoxazine resins. Upon crosslinking, the polymer shows high char yield of 40%, which is a marked improvement from a mere 4% of the unfunctionalized cellulose. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

双酚S型苯并恶嗪改性酚醛树脂模塑料的性能研究

以双酚S为原料,采用溶剂法合成了一种含砜基的苯并恶嗪(BOZ–S),并用不同长度的高性能维纶短切纤维(PVAF)为增强材料,通过预浸料模压成型制备出BOZ–S改性酚醛树脂(PF)模塑料。利用傅里叶变换红外光谱仪、核磁共振仪、差示扫描量热仪以及扫描电子显微镜等分别对BOZ–S的单体结构、PF/BOZ–S改性体系的固化特性、改性PF模塑料的力学性能、热性能以及冲击断口进行了分析研究。结果表明,成功合成出了预期结构的BOZ–S,且固化时存在两种放热反应;改性树脂体系的各项性能与纯PF相比均有明显提升,且纤维的长度越长,模塑料的力学性能提升越大,其中PF/BOZ–S质量比为80/20、纤维长度为36 mm时,体系的综合性能最佳,冲击强度和弯曲强度分别为88.4 k J/m~2和175.9 MPa,弯曲弹性模量达到8.8 GPa,马丁耐热温度为164.3℃。     

苯并𫫇嗪树脂研究进展

聚苯并嗪树脂（PBZ）是一类杂环聚合物材料,具有优异的热稳定性、高的抗拉强度和良好的耐化学性,在航空复合材料、共混物和电子电路板等许多领域得到了应用。本文概述了制备苯并嗪（BZ）单体的三种路线及合成方法,总结了在无催化剂条件下BZ单体的阳离子开环聚合（ROP）机理;详细阐述了含可固化基团的功能化BZ单体的种类以及可固化基团对PBZ树脂性能的影响,同样也详细论述了不含可固化基团的功能化BZ单体的结构性能以及研究现状。通过分子设计,科研人员已制备出了单官能团取代、双官能团取代、可聚合官能团取代的BZ单体,以及高分子量主链的BZ和主链含有BZ单元的化合物材料;简述了PBZ复合材料的研究进展,指出了PBZ树脂存在加工温度高、经典的PBZ脆性大的缺点以及产生的原因,最后指出苯并嗪树脂的发展方向为制备绿色生物基BZ、PBZ复合材料的改性以及合成新结构的功能性BZ。     

苯并噁嗪/钛酸钡复合材料介电性能的研究

通过共混法制备了苯并噁嗪/钛酸钡复合材料,探讨了钛酸钡粒径和填充量对复合材料介电性的影响。当?(BaTiO3)=50%时,复合材料介电常数εr达54、介质损耗tanδ为0.027、体积电阻率ρv大于1011?·m、击穿电压Vb大于8×103V/mm的高εr低tanδ绝缘材料。并将其应用于制备内嵌式电容器用玻璃布复合层压板。     

苯并噁嗪树脂的合成及在形状记忆聚合物中的应用研究进展

苯并噁嗪树脂作为一类新型的热固性树脂,具有分子设计性强、阻燃性能和耐腐蚀性能优异、固化时不需要强酸、无小分子放出等优点,在航空、建筑、电子等领域获得了广泛应用。本文主要介绍了苯并噁嗪单体的合成方法（溶剂法、无溶剂法和悬浮法）、降低苯并噁嗪开环聚合温度的方法（合成具有特殊基团的苯并噁嗪单体、添加催化剂）及苯并噁嗪树脂在形状记忆聚合物中的应用（与其他聚合物混合,纯苯并噁嗪化学改性）,对苯并噁嗪形状记忆聚合物目前存在的问题进行了概述并对苯并噁嗪形状记忆聚合物的发展前景做出了展望。     

一种新型工程塑料——苯并嗯嗪的研究进展

苯并嗯嗪是一种新型热固性树脂，从单体引入功能基团、共混改性、加入纳米材料和增强纤维4个方面综述了苯并嗯嗪改性的研究进展。