【摘 要】
：
A phosphrous-containing poly(aryl ether ketone) was synthesized derived from bisphenol-A and bis[4-(4-fluorobenzoyl)phenyl] phenyl phosphine oxide (FPPPO) by nu
论文部分内容阅读
A phosphrous-containing poly(aryl ether ketone) was synthesized derived from bisphenol-A and bis[4-(4-fluorobenzoyl)phenyl] phenyl phosphine oxide (FPPPO) by nucleophilic substitution reaction. The structure of the polymer was characterized by FT-IR, 1H-NMR and 31p-NMR. The thermal property of the PAEK was measured by DSC and TGA.The glass transition temperature (Tg) of the polymer was 205℃, and the 5% weight loss temperature under nitrogen was 475℃. Good solubility of the polymer in organic solvents, such as N-methylpyrrolidone, dimethylformamide,dimethylacetamide, dimethylsulfoxide and chloroalkanes was observed, flexible film was obtained from the polymers CH2Cl2 solution. The limiting oxygen index (LOI) of the PAEK was 40, which indicated that organic phosphorus moiety can offer good flame retardant property to the polymer.
其他文献
以小麦品种(系)千斤早和9848的幼胚组织为材料,研究了Cu2+对小麦幼胚组织脱分化和再分化特性的影响。结果表明,诱导培养基中的Cu2+对小麦幼胚愈伤组织的形成无显著影响,但
160只1日龄艾维茵肉仔鸡随机分成4组,分别饲喂添加0%,0.2%,0.4%和0.8%谷氨酰胺的饲粮28 d.每周末每组取6只鸡,颈静脉放血致死,取脾脏,Bouin液固定,制作石蜡切片,HE染色,光镜
目的 了解鼠疫菌102kb pgm基因座一端IS100的缺失与pgm~1稳定性的关系。方法 采用聚合酶链式反应(PCR)扩增国内各型鼠疫菌102kb pgm基因座色素沉着这一端IS100的片段,并选择
研究了大田期氮磷钾营养及配比对白肋烟中有关保护酶的影响及相关物质的动态。结果表明,过氧化物酶(POD)活性与脯氨酸(Pro)含量在烟株生长前期表现为上升趋势、后期呈现下降
远程监控系统是煤炭企业的重要信息系统.该系统可以实现通过网络对分布在不同地方的煤炭企业的生产单位和管理单位进行实时的数据监控,从而能够在第一时间内发现问题.为了保
无线传感器在现代社会应用越来越广泛,其与计算机的结合技术受到越来越多的应用与推广。两者之间进行的路由协议是通过相互构建形成的,从计算机技术角度分析,无线传感器属于
目的观察冠脉介入治疗术中冠脉缺血预适应对缺血修饰蛋白的影响,探讨缺血修饰蛋白改变对球囊预扩张产生缺血预处理效应的评价意义。方法随机入选60例行冠状动脉造影术的病人,
Elastic scattering properties of the ultracold interaction for the triplet state of 133Cs and 85Rb atoms are studied using two kinds of potentials by the same p
A series of carboxylic acids was esterified to the corresponding esters with TiCl4 as catalyst at room temperature,in high yields. This catalyst was highly effe
This paper presents a novel approach for human identification at a distance using gait recognition.Recog- nition of a person from their gait is a biometric of increasing interest.The proposed work int