邻苯二甲酸二酯系玻璃材料中裂纹愈合效应研究

Investigation on the crack healing effect in dimethyl phthalate series glassy materials

用最近发明的一种能够实时检测玻璃材料中应力诱导裂纹(stress cracking)和裂纹愈合(crack-healing)的新方法(RMS-L-CH)对邻苯二甲酸二甲酯、邻苯二甲酸二乙酯、邻苯二甲酸二丁酯和邻苯二甲酸二辛酯的系列玻璃材料中应力诱导裂纹和裂纹愈合效应进行了测量,对裂纹愈合效应的现象及其与玻璃化转变的关系进行了深入的研究与讨论.结果进一步验证了RMS-L-CH方法的有效性,并且表明该方法可能提供一种表征玻璃化转变过程和研究玻璃化转变机理的新手段.

The stress cracking and crack-healing effects in dimethyl phthalate, diethyl phthalate, dibutyl phthalate and dioctyl phthalate series glassy materials was measured by the recently invented method （RMS-L-CH） which measures the stress cracking and crack healing in situ and further analysis and discussions on the crack healing phenomenon as well as its relation to the glass transition are presented. The results validate that the RMS-L-CH method is effective and may provide a new means to characterize the glass transition and to probe into the glass transition mechanism.