摘要
聚苯硫醚(PPS)和聚醚砜(PES)树脂都具有较好的耐腐蚀性和较高的耐热性能,这2种热塑性聚合物共混改性可能会得到具有优良性能的共混物。采用差示扫描量热法(DSC)分析共混物的玻璃化转变温度(Tg)及结晶熔融情况,利用扫描电镜观察共混物的形貌结构,并在氮气气氛下用热天平分析共混物的耐热性能。结果表明:PPS/PES共混物具有2个Tg,且这2个Tg都介于纯聚合物的Tg之间;共混物断面形态比较均匀,两相界面比较模糊,表明共混物为部分相容体系;随着PPS组分的增加,结晶熔融热也逐渐增大,说明PES降低了PPS的结晶度。用热天平对共混物的耐热性能进行了研究,结果表明共混物在不同PPS/PES比例下耐热性能并没有发生明显变化。
Polyphenylene sulfide （PPS） and polyether sulfone （PES） both have high anti-corrosion and heat resistance. In order to obtain better performance, the two thermoplastics polymers were blended with different proportions. DSC was used to measure Tg of the blends and the crystalline melting enthalpy, and SEM was employed to observe the appearances and structures of the blends. The heat resistance of the blends was tested by thermal balance in the atmosphere of nitrogen. The results show that there are two points of Tg. Both of them are between the Tg of pure PPS and pure PES. The cross-section morphology of the blends is homogeneous, and there exists no obvious interface between the two phases, which indicates that the blends are partially compatible. With the content of PPS rising, the value of the crystalline melting enthalpy increases, which indicates that the crystallinity is reduced by PES. In addition, the ratio of PPS to PES in the blends nearly has no effect on the heat resistance.
出处
《失效分析与预防》
2010年第1期17-20,共4页
Failure Analysis and Prevention
基金
北京市属高等学校人才强教计划资助项目
