中文摘要：

光热敏微胶囊材料可作为新型非银盐信息记录媒质，其囊芯光敏反应是实现光信息记录的关键。本文利用傅立叶变换红外光谱技术，通过监测囊芯TMPTA单体的C=C双键在1650—1626cm^-1处特征吸收峰随曝光时间的变化，发现在紫外光照射下，TMPTA分子C—C双键在光引发剂自由基作用下发生交联聚合而引起微胶囊囊芯固化，随曝光时间增长，囊芯固化程度表现为先快速增加，再到曝光20s后基本达到稳定。显影密度检测表明，光热敏徽胶囊内部固化程度直接决定了后续热显影的影像密度，进而在不同曝光时间下形成了影像密度反差。

英文摘要：

The photo-heat sensitive microcapsule material can be acted as novel non-silver information recording medium, and the photo-sensitive property in microcapsule core is the key factor to affect the information recording efficiency. The C=C bonds characteristic absorption around 1650-1626 cm^-1 of TMPTA monomer, which comprises of the microcapsule core compound, has been detected with FTIR spectra technique. Results imply that the C=C bonds of TMPTA has been photo-crosslinked initiated by the photoinitiator radicals during UV exposure, while the photo-crosslinking extent rises with the exposure time increase and takes stable extent after exposed for 20s . Based on image density detection, it shows that the heat-sensitive colorforming process is decided by the core photo-solidification for the photo-heat sensitive microcapsule material, and the image density contrast has been formed at different exposure time.