含活性羧基不同软段长度聚醚砜酰胺树脂制备及性能

Different Soft Segment Length Polyether Sulfonamide Resins Containing Active Carboxyl Groups:Preparation and Properties

以不同长度的长链醚胺与对氟苯甲酰氯为原料,通过界面亲电取代反应合成了3种双氟取代的长链醚胺,并采用常压溶液缩聚法,将其与联苯二酚、4,4'-二氯二苯砜及2-(双(4-羟基苯基)甲基)苯甲酸通过共聚的方式,制备了一系列新型不同脂肪链段长度及含量的聚芳醚酰胺树脂。通过红外光谱和核磁共振氢谱表征了单体及聚合物的化学结构;差示扫描量热分析、动态力学热分析和热重分析结果表明所制备的聚合物具有优异的热性能,并且能够通过改变分子链段中软段的种类及共聚比例,对热性能进行一定程度的调整(玻璃化转变温度在83.9~215.3℃之间,热分解温度在361.3~426.3℃之间);通过拉伸实验对其拉伸强度和断裂伸长率进行了表征;摩擦学性能测试表明该系列聚合物摩擦系数为0.50~0.60。该类聚合物具有优良的热性能、力学性能及摩擦性能,可望作为特殊树脂材料用于高温、耐磨苛刻环境。

Three kinds of difluoro-substituted long-chain ether amine monomers were synthesized from different length long-chain ether amines and p-fluorobenzoyl chloride by interfacial electrophilic substitution reaction.Then they were conducted to copolymerize with hydroquinone,4,4’-dichlorodiphenylsulfone and 2-(bis(4-hydroxyphenyl)methyl)benzoic acid under atmospheric pressure to yield a series of novel polyarylene ether amide resins with different lengths and contents of fatty chain segments.The chemical structures of the monomers and copolymers were characterized by FT-IR and 1H-NMR.The results of differential scanning calorimetry(DSC),dynamic thermomechanical analysis(DMA)and thermogravimetric analysis(TGA)show that the resultant copolymers have excellent thermal properties,and the thermal properties can be adjusted to a certain extent by changing the type and copolymerization ratio of soft segments in molecular segments(with the glass transition temperature of 83.9~215.3℃,thermal decomposition temperature of 361.3~426.3℃);the tensile strength and elongation at break were characterized,and the tribological performance test show that the friction coefficient of these resultant copolymers is 0.50~0.60.The results show that these copolymers have good thermal,mechanical and friction properties,and they are expected to be used as special resin material in high temperature,wear-resistant and harsh environment.