摘要
通过预聚反应制备了一种新型聚苯并噁嗪改性树脂。利用FTIR、GPC表征了改性树脂。利用旋转黏度计、DSC、DMA和TGA分别考察了树脂的流动性能、固化行为和改性树脂固化物的热性能。结果表明:制备的苯并噁嗪改性树脂在60～100℃,黏度小于500 mPa.s,恒温6 h黏度不明显增大,具有良好的流动性能,适用于RTM成型工艺。改性树脂聚合温度较低,具有良好的固化工艺性。改性树脂固化物在氮气气氛下Td5在430℃以上,在900℃的残重高达73.71%,Tg为353.4℃,具有良好热性能。
A novel modified polybenzoxazine resin was prepared. The final product was characterized with Fou- rier transform infrared spectrometry （FT-IR） and gel permeation chromatography （GPC）. Processing capability and cure behavior of the modified resin was investigated by rotary viscometer and differential scanning calorimetry （ DSC）, respectively. The resin shows a low viscosity of 180 mPa. s at 60~C for above 6 hours, indicating that the resin is suit-able for resin transfer molding （RTM） process to fabricate composites. DSC results show the modified resin can be cured at about 200℃ without adding any other curing additives. Dynamic mechanical analysis （DMA） shows the in- flection point of tan8 is 353.4℃. Thermogravimetric analysis （TGA） showed 5% weight loss temperature of the final cured products in nitrogen is 437.9℃, and char yield is 73.71% at 900℃.
出处
《宇航材料工艺》
CAS
CSCD
北大核心
2013年第4期35-38,共4页
Aerospace Materials & Technology
基金
国家科学基金资助(No.50903086
No.21104090)
关键词
苯并噁嗪
改性树脂
加工性能
热性能
Benzoxazine, Modified resin, Processablity, Thermal property
