采用傅里叶红外变换光谱（FT-IR）、介电分析（DEA）和差示扫描量热分析（DSC）研究了环氧沥青等温固化反应过程中固化反应速率和转化率的变化。并利用激光扫描共聚焦显微镜（LSCM）研究了环氧沥青固化反应过程中微观形貌的变化。实时FT—IR、DEA和DSC研究表明，120℃时环氧沥青固化2．5h后，反应完全结束，介电分析结果证明环氧沥青固化反应属于自催化反应。LSCM结果表明，沥青在环氧树脂交联网络中形成相分离，沥青聚集形成分散相，均匀地分散在环氧树脂形成的交联网络中。
Real time FT-IR, dielectric analysis (DEA) and differential scanning calorimetry (DSC) were used to monitor the continuous isothermal curing process of epoxy asphalt at 120℃. Moreover, laser scanning confocal microscopy (LSCM) was employed to observe the morphology of epoxy asphalt during the curing process. FT-IR, DEA and DSC results show that epoxy asphalt is fully cured after 2.5 h at 120℃. Furthermore, DEA result proves that the reaction belongs to the self-catalyzed reaction. LSCM results show that the phase separation takes place due to the formation of the asphalt aggregates in the networks of crosslinked epoxy resin. And the size of asphah aggregates increases until the stable crosslinked networks are formed.
参考文献
| [1] | Yang Kang;Fei Wang;Zhiming Chen .Reaction of asphalt and maleic anhydride: Kinetics and mechanism[J].Chemical engineering journal,2010(1):230-237. |
| [2] | 潘磊,王玉婷,王成双,王治流,谢鸿峰.热固性环氧树脂改性沥青粘结剂的性能研究[J].热固性树脂,2011(04):33-37. |
| [3] | 王治流,刘全伟,杨琥,程镕时.红外光谱法对环氧沥青固化机理的研究[J].高分子材料科学与工程,2005(03):93-95. |
| [4] | 谢鸿峰,戴杰,刘承果,袁钻如,王治流,程镕时.环氧沥青的热分析[J].高分子材料科学与工程,2009(11):115-117. |
| [5] | Russell J Varley .Toughening of epoxy resin systems using low-viscosity additives[J].Polymer international,2004(1):78-84. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%