含噁嗪环硅烷偶联剂对石英纤维/含硅芳炔复合材料性能的影响

Effects of Benzoxazine-Containing Silane Coupling Agent on Properties of QF/PSA Composites

从石英纤维(QF)、含硅芳炔树脂(PSA)分子结构特点出发,设计并合成了一种含有噁嗪环和端炔的新型硅烷偶联剂(BCA),并以BCA改善QF/PSA复合材料的界面性能。采用差示扫描量热分析(DSC)、红外光谱分析(FT-IR)、X-射线电子能谱(XPS)及扫描电镜(SEM)等测试手段表征了BCA与QF/PSA复合材料的相互作用和界面改性效果。结果表明:BCA能够分别与PSA和QF形成良好的化学键合,改善复合材料的界面黏结;经w=2.0%的BCA处理后,QF/PSA复合材料的层间剪切强度、弯曲强度分别较未处理前提高了69.1%和68.8%。

Based on the structural characteristic of quartz fiber （QF） and silicon-containing arylacetylene （PSA）,a new type of coupling agent （BCA） containing benzoxazine and alkynyl groups was designed and prepared.BCA was introduced to improve the interface mechanical properties of QF/PSA composite.Differential Scanning Calorimeter （DSC）,Fourier Transform Infrared Spectrometer （FT-IR）,X-ray Photoelectron Spectroscopy （XPS） and Scanning Electron Microscope （SEM） analyses were used to study the interactions between BCA and QF with PSA resin.Results revealed that BCA bonded well with the fiber and improved the interface adhesive properties of QF/PSA composite.When the composite was modified with 2.0% （mass fraction） BCA,the interlayer shear strength and flexible strength increased by 69.1% and 68.8%,respectively.