CAJ | 학술논문

以超临界CO2为物理发泡剂通过固态间歇发泡法制备了不同共混比例的聚苯硫醚／聚醚醚酮(PPS／PEEK)微孔材料。采用差示扫描量热法探讨了PPS／PEEK共混物的热性能，通过扫描电子显微镜观察分析了共混组成和饱和压力对微孔材料泡孔结构与分布的影响规律，并对微孔材料的冲击强度、介电常数和动态力学性能进行了研究。结果表明，共混使PPS相和PEEK相的结晶度增大，共混物中的气体饱和浓度随着PEEK组分含量的增加而增大。与纯PPS和PEEK相比，共混物中形成致密的多级泡孔结构。饱和压力越大则微孔材料的泡孔密度越大，且泡孔尺寸越小。微孔发泡使PPS／PEEK共混物的冲击强度增大，介电常数和储能模量降低。
이초림계CO2위물리발포제통과고태간헐발포법제비료불동공혼비례적취분류미／취미미동(PPS／PEEK)미공재료。채용차시소묘량열법탐토료PPS／PEEK공혼물적열성능，통과소묘전자현미경관찰분석료공혼조성화포화압력대미공재료포공결구여분포적영향규률，병대미공재료적충격강도、개전상수화동태역학성능진행료연구。결과표명，공혼사PPS상화PEEK상적결정도증대，공혼물중적기체포화농도수착PEEK조분함량적증가이증대。여순PPS화PEEK상비，공혼물중형성치밀적다급포공결구。포화압력월대칙미공재료적포공밀도월대，차포공척촌월소。미공발포사PPS／PEEK공혼물적충격강도증대，개전상수화저능모량강저。
Microcellular foams from polyphenylene sulfide/poly(ether-ether-ketone) (PPS/PEEK) blends with various blend ratios using the solid-state batch foaming technique with supercritical CO2 as a physical-blowing agent. The thermal properties were discussed by using differential scanning calorimetry,and the effects of blend composition and saturation pressure on the cellular structure and distribution were analyzed with the graphs observed by scanning electronic microscopy. The impact strength,dielectric constant and dynamic mechanical properties of the microcellular foams were also investigated. The results show that blending increase the crystallinities of PPS and PEEK phases. The gas concentration in the PPS/PEEK blends increases with the improved PEEK content. Compared with pure PPS and PEEK,the PPS/PEEK blends exhibit hierarchical cellular structures. The cell density increases and the cell size decreases with the increasing saturation pressure. Microcellular foaming improves the impact strength,and decreases the dielectric constant and storage modulus of PPS/PEEK blends.