固体火箭技术
固體火箭技術
고체화전기술
JOURNAL OF SOLID ROCKET TECHNOLOGY
2014年
5期
704-710
,共7页
汪益龙%刘小云%庄启昕%韩哲文
汪益龍%劉小雲%莊啟昕%韓哲文
왕익룡%류소운%장계흔%한철문
PBO纤维%单向复合材料%湿热老化%界面
PBO纖維%單嚮複閤材料%濕熱老化%界麵
PBO섬유%단향복합재료%습열노화%계면
PBO fiber%unidirectional composite material%hygrothermal aging%interface
研究了在湿热老化过程中,PBO纤维/环氧树脂单向复合材料弯曲性能的变化规律,发现PBO纤维/环氧树脂复合材料具有不同于一般的纤维增强树脂复合材料的湿热老化特点。研究发现PBO纤维/环氧树脂单向复合材料在湿热老化过程中,相比温度而言,湿度对复合材料弯曲性能的影响更为显著,复合材料在老化过程中吸水率增加的同时,弯曲性能相应降低。其主要原因在于PBO纤维的表面为化学惰性,表面形貌光滑,与环氧树脂浸润性不好,界面粘接力主要是较弱的范德华力。在湿热老化过程中,水分的吸收和渗透造成PBO纤维与环氧树脂基体之间的界面的破坏,构成了该类复合材料独特的湿热老化特性。
研究瞭在濕熱老化過程中,PBO纖維/環氧樹脂單嚮複閤材料彎麯性能的變化規律,髮現PBO纖維/環氧樹脂複閤材料具有不同于一般的纖維增彊樹脂複閤材料的濕熱老化特點。研究髮現PBO纖維/環氧樹脂單嚮複閤材料在濕熱老化過程中,相比溫度而言,濕度對複閤材料彎麯性能的影響更為顯著,複閤材料在老化過程中吸水率增加的同時,彎麯性能相應降低。其主要原因在于PBO纖維的錶麵為化學惰性,錶麵形貌光滑,與環氧樹脂浸潤性不好,界麵粘接力主要是較弱的範德華力。在濕熱老化過程中,水分的吸收和滲透造成PBO纖維與環氧樹脂基體之間的界麵的破壞,構成瞭該類複閤材料獨特的濕熱老化特性。
연구료재습열노화과정중,PBO섬유/배양수지단향복합재료만곡성능적변화규률,발현PBO섬유/배양수지복합재료구유불동우일반적섬유증강수지복합재료적습열노화특점。연구발현PBO섬유/배양수지단향복합재료재습열노화과정중,상비온도이언,습도대복합재료만곡성능적영향경위현저,복합재료재노화과정중흡수솔증가적동시,만곡성능상응강저。기주요원인재우PBO섬유적표면위화학타성,표면형모광활,여배양수지침윤성불호,계면점접력주요시교약적범덕화력。재습열노화과정중,수분적흡수화삼투조성PBO섬유여배양수지기체지간적계면적파배,구성료해류복합재료독특적습열노화특성。
The effects of hygrothermal aging on the PBO fiber/epoxy resin unidirectional composites were investigated through studying the bending properties, the surface physical and chemical state of PBO fiber, the water absorption ratio, and the interfacial shear strength of PBO fiber and composites. The results show that the bending properties of PBO fiber/epoxy resin unidirectional composites are more sensitive to the humidity during hygrothermal aging. The bending properties of composites decrease when the water absorption ratio of composites increases during aging. The possible reason is that the surface of PBO fiber is smooth without active groups;the interfacial binding force between PBO fiber and epoxy resin presents mainly Van der Waals force, which is weak and is easy to be broken by water. During hygrothermal aging, the absorption and the penetration of water would result in the sharp decrease of interfacial binding force between fiber and resin and would destruct the bond between fiber and composites. This is the particular character of the hygrothermal aging of PBO fiber/epoxy unidirectional composite.