二苯甲酮系列产品的合成及应用

评述了二苯甲酮系列产品的主要合成方法 ,并对其主要用途进行了介绍     

Benzoylation of benzene to benzophenone over zeolite catalysts

The liquid phase benzoylation of benzene with benzoyl chloride (BOC) to benzophenone is catalyzed by various zeolites at 353 K. Zeolite H-beta is found to be more active than the other zeolites. The conversion of benzoyl chloride to benzophenone over H-beta increases significantly with increase in the reaction time, temperature, catalyst/BOC (wt/wt) and benzene/BOC (mole) ratios. The yield of benzophenone decreases with increase in SiO₂/Al₂O₃ ratio and isomorphous substitution of Al-by Ga- and Fe-in zeolite H-Al-beta in the following order: Al-> Ga-> Fe-H-beta suggesting that high density of acidic centers along with strong acid sites are required for the reaction.     

新型催化剂合成对甲氧基二苯甲酮的研究

介绍用水杨酸铁合成对甲氧基二苯甲酮的方法，并从多方面与传统催化剂无水三氯化铝进行比较，该新型催化剂具有用量少、产率高、工艺简单、无污染等优点。     

含二苯甲酮基的有机硅光引发体系

在UV照射下,用含巯基的有机硅化合物与聚甲基乙烯基硅氧烷加成硫化虽有专利报道,但该反应体系是以二苯甲酮类化合物作为光敏剂。当我们进行这方面研究时,发现二苯甲酮与有机硅氧烷预聚物相容性差,从而影响光加成反应的速度。为了改善光敏剂与有机硅预聚物的相容性,本文合成了具二苯甲酮基团的环状有机硅氧烷及其高聚物作为光敏剂。我们的合成路线是用硅氢加成反应,制备了文献没有报道的具二苯甲酮侧基的环状硅氧烷,然后将其与八甲基环四硅氧烷一起进行开环聚合,得到了具有二苯甲酮侧基的聚有机硅氧烷,其反应过程如下:     

一种可溶性双酮酐型共聚酰亚胺的合成及性能

以均苯四甲酸二酐(PMDA)和4,4’-对苯二甲酰二邻苯二甲酸酐(TDPA)为二酐单体,4,4’-(3-氨基苯氧基)二苯甲酮(BABP)为二胺单体,采用两步法低温溶液缩聚合成了系列双酮酐型共聚酰亚胺。采用红外光谱、X射线衍射、差示扫描量热分析、热重分析、拉伸测试和溶解性能测试对聚合物的结构与性能进行了表征,考察了TDPA/PMDA不同摩尔比对共聚酰亚胺溶解性、耐热性和力学性能的影响。结果表明,双酮酐型聚酰亚胺的玻璃化转变温度随TDPA摩尔含量的增加逐渐下降,溶解性能则逐渐提高,当TDPA/PMDA摩尔比为7/3时,共聚酰亚胺具有优良的耐热性能及力学性能,可溶于N,N-二甲基甲酰胺(DMF)等极性溶剂。     

二苯甲酮腙的合成研究进展

阐述了二苯甲酮腙的主要合成方法及其反应机理,并对各种合成方法进行了比较分析。     

二苯甲酮和1-羟基环己基苯基甲酮从食品包装纸向奶粉与Tenax迁移研究

对二苯甲酮和1-羟基环己基苯基甲酮在高温条件下从食品包装纸（白卡纸和牛皮纸）向脂肪类模拟物Tenax以及全脂奶粉中的迁移规律进行研究。为避开奶粉中杂质色谱峰的干扰,气相色谱的升温条件为柱温：80 ℃保留3 min,温度以20 ℃/min 的速率升到150 ℃,保留10 min,然后再以30 ℃/min 升到290 ℃保留10 min。结果表明：温度越高,光引发剂向食品的迁移率就越高,且迁移速率也越大,达到平衡的时间也越短。纸张本身对脂肪的渗透能力是影响污染物迁移的重要影响因素,在高温下包装含脂量较高的食品时,应尽量避免选用脂肪渗透能力较强的纸张。光引发剂由同种纸质食品包装材料分别向Tenax和全脂奶粉迁移的研究表明,光引发剂向奶粉迁移的迁出率较高,奶粉作为一种真实的食品,有很好的吸附能力,因而适合用于做迁移研究,且奶粉成分复杂,更能代表真实食品的特性。     

Efficiency of 4,4′‐bis(N,N‐diethylamino) benzophenone for the polymerization of dimethacrylate resins in thick sections

The efficiency of 4,4′‐bis(N,N‐diethylamino)benzophenone (DEABP) for the polymerization of dimethacrylate monomers in thick sections ( 1 – 2 mm) was studied. DEABP (λ_max = 365 nm) represents a complete initiating system as it contains both ketone and amine functional groups. During irradiation, DEABP photobleaches at a fast rate causing deeper penetration of light through the underlying layers, but the photoinitiation efficiency (rate of polymerization per photon absorption rate) is relatively poor. As a result, irradiation of methacrylate monomers at 365 nm results in a slow average polymerization rate and a reduced monomer conversion for thick sections due to the light attenuation caused by the high absorptivity of DEABP and photolysis products. These results highlight the inherent interlinking of light attenuation and photobleaching rate in polymerization of thick sections. Copyright © 2011 Society of Chemical Industry     

2－羧基－4′－二乙氨基－2′－羟基二苯甲酮的合成研究

本文以间－二乙氨基本酚和邻苯二甲酸酐为原料合成２－羧基４′－二乙氨基－２′－羟基二苯甲酮．研究了反应机理并采用碱分解法改进了合成方法，既提高了产物的纯度和收率，又解决了生产中严重的污染问题．通过对影响反应产率诸因素的研究，获得了较佳合成条件．     

Toughening of AT-Resins with a Polyphenylquinoxaline

Acetylene terminated (AT) resins are addition-curable thermoset materials which do not generate volatiles during cure and therefore can be fabricated into void-free structures. They retain good thermal and mechanical properties even after exposure to high humidity environments. Their use as composite matrix resins and adhesives has shown promise. These resins, however, are brittle. Molecular structure modifications and blending with thermoplastic modifiers have been used to improve their toughness. In this work, improvement in toughness has been sought through the use of a polyphenylquinoxaline (PPQ) modifier. The blended systems showed improvements in toughness, thermooxidative stability, and lap shear strength over the original AT-resins.