摘要
苯并口恶嗪树脂(Bz)是一类耐热性很好和残炭率较高的酚醛树脂。结合光聚合技术,通过分子设计合成出具有新型功能的苯并口恶嗪单体,使用核磁氢谱和傅里叶变换红外光谱对其结构进行表征和确认。利用实时红外研究其光聚合行为,透射红外研究其热固化行为;萃取法和热重分析分别测其凝胶含量以及热稳定性。实验结果表明,合成出的新型苯并口恶嗪(BZOA)具有自引发自交联功能,双键转化率最大可达99.96%。热聚合过程中先碳碳双键反应而后开环固化,热固化产物的凝胶含量达到91.36%。随着BZOA量的增加,BZOA共聚物的残炭率(Yc)从0.48%升高到29.03%,耐热性能显著提高。
Benzoxazine resin is one kind of phenolic resin with good heat resistance and high char yield.A novel benzoxazine monomer was synthesized by monocular structure design and its structure was characterized by 1 H-NMR and FT-IR spectra.The photo-polymerization and thermal activated curing behavior were respectively investigated by real-time IR and transmission IR.The gel content and thermal stability were measured by extraction and thermogravimetric analysis(TGA).The results indicate that the novel benzoxazine monomer possesses the function of self-initiation and self-crosslink,and the maximum double bond conversion is up to 99.96%.During the heat-curable process,the double bond was cured firstly,then ring-opening cure occurred completely.The gel content of the heat-curable product reaches 91.36%.With the content of BZOA increased,increase in the char yield of the copolymer is observed from 0.48%to 29.03%,the thermal stability significantly is improved.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2014年第11期35-39,44,共6页
Polymer Materials Science & Engineering
基金
江苏省太阳能电池材料与技术重点实验室开放基金
关键词
苯并口恶嗪
自引发
自交联
热稳定性
benzoxazine
self-initiation
self-cross-link
thermal-stability
