Synthesis and Thermal Crosslinking Behavior of Poly(aryl ether ketone)s Containing 1,4-Naphthalene

来源 :Chemical Research in Chinese Universities | 被引量 : 0次 | 上传用户:jklzqren12
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
A new monomer, 1,4-bis(4-fluorobenzoyl) naphthalene(compound 2) was synthesized via a two-step reaction. 1,4-Naphthalenedicarboxylic acid chloride(compound 1) was prepared by using the acyl chlorization reaction of 1,4-naphthalenedicarboxylic acid with thionyl chloride. The Friedel-Crafts acylation of compound 1 with fluorobenzene afforded compound 2 in a 80% yield. The polycondensation of compound 2 with various bisphenols in tetramethylene sulfone(TMS) in the presence of excess potassium carbonate as a condensation reagent was carried out at 210 ℃ to quantitatively afford the corresponding poly(aryl ether ketone)s(compounds 3_8) containing 1,4-naphthalene moieties. Thermal analyses showed that the polymers have T g values ranging from 496 to 500 K and are thermally stable in air with initial mass loss above 500 ℃. These novel polymers exhibited an excellent solubility in organic solvents including NMP, DMAc, and chloroform, etc. In addition, the glass transition temperatures of these polymers increased and the polymers became insoluble in chloroform after treated at 260 ℃, indicating the occurrence of a thermal crosslinking reaction. 1,4-Bis (4-fluorobenzoyl) naphthalene (compound 2) was synthesized via a two-step reaction. 1,4-Naphthalenedicarboxylic acid chloride (compound 1) was prepared by using the acyl chlorization reaction of 1, The Friedel-Crafts acylation of compound 1 with fluorobenzene afforded compound 2 in a 80% yield. The polycondensation of compound 2 with various bisphenols in tetramethylene sulfone (TMS) in the presence of excess potassium carbonate as a The condensation reagents were carried out at 210 ° C to quantitatively afford the corresponding poly (aryl ether ketone) s (compounds 3_8) containing 1,4-naphthalene moieties. Thermal analysis showed that the polymers have T g values ​​ranging from 496 to 500 K and are thermally stable in air with initial mass loss above 500 ° C. These novel polymers exhibited an excellent solubility in organic solvents including NMP, DMAc, and chloroform, etc. In addition, the glass transition temperatures of these polymers increased and the polymers became insoluble in chloroform after treated at 260 ℃, indicating the occurrence of a thermal crosslinking reaction.
其他文献
本刊讯为认真贯彻落实省委、省政府主要领导同志指示和1月11日晚全省安全生产紧急电视电话会议精神,部署当前全省学校安全工作,1月26日下午,省委教育工委、省教育厅召开全省
2011年3月11日14时46分(北京时间13时46分),日本尔海岸附近海域发生了里氏9.0级地震,震中位于北纬38.1度,东经142.6度,震源深度约20公里。地震引发了巨大海啸和核泄漏事故,当
近一个时期,世界各地频发地震、海啸等灾难。很多人在目睹灾难发生的同时内心感到无限恐慌。心理学上,有一个近因效应,即印象的形成主要取决于后来出现的刺激,或越是新近发生
地处西南大山腹地的遵义,是全国著名的“转折之城”、“会议之都”。1935年,中国工农红军长征至黔,在这里召开了举世闻名的遵义会议,为中国历史写下了浓墨重彩的一笔。忆往昔
环境对于英语学习的重要性是不言而喻的。很多学生之所以学习成绩不理想,其主要原因是实际运用的欠缺。所以创设尽可能多的英语语言环境,让学生更多地接触和感受英语并使用英
Through the fluorescence and ultraviolet- visible spectrophotometry we have studied the action of ce- foperazone sodium and worfloxacin, two kinds of medicine w
XDC是EVS旗下一家主要从事数字影院技术服务的比利时公司,近日在慕尼黑电影周期间宣布其在德国安装的数字影院设备超过了100套。此外,他们还对外公布了它的最新开放式数字影
Two new acetylenic compounds were isolated from the roots of Asparagus gobicus. Their structures were elucidated by spectroscopic methods including 2D NMR techn
本文阐述了新课程高中语文课堂教学。主要通过注重情感熏陶、调动参与意识、引导提问质疑等三方面加以激发情趣,从而达到课堂教学目的。 This article elaborates the new c
2006第一个季度高达10.2%的GDP增长,引发了专家及有关方面对新一轮过度投资从而创造更大产能过剩风险的担忧。与这个10.2GDP增长有关的数据,还可以举出第一季度银行新增贷款