CAJ | 학술논문

为探讨嵌缝材料老化机理及评价指标，选择几种低模量聚氨酯嵌缝材料，研究了嵌缝材料的耐热、耐碱、耐水和耐紫外线老化性能。结果表明，热老化后的材料拉伸强度和拉伸粘结强度明显增大，最高分别增加了156％和117％；材料的耐碱性能较好，碱处理后拉伸性能基本保持不变，但是浸水后粘结性能下降，拉伸粘结强度最高下降了47％；紫外线照射加速了嵌缝材料的老化，表现为材料起皮、龟裂和开裂。提出了增加热老化后拉伸强度上限值和紫外老化后外观来评价嵌缝材料老化性能的建议。
위탐토감봉재료노화궤리급평개지표，선택궤충저모량취안지감봉재료，연구료감봉재료적내열、내감、내수화내자외선노화성능。결과표명，열노화후적재료랍신강도화랍신점결강도명현증대，최고분별증가료156％화117％；재료적내감성능교호，감처리후랍신성능기본보지불변，단시침수후점결성능하강，랍신점결강도최고하강료47％；자외선조사가속료감봉재료적노화，표현위재료기피、구렬화개렬。제출료증가열노화후랍신강도상한치화자외노화후외관래평개감봉재료노화성능적건의。
In order to investigate the aging mechanism and evaluation standard of joint materials, the joint ma?terials properties of heat resistance,alkali resistance,water resistance and UV resistance were researched by selec?ting several low modulus polyurethane joint material. The results showed that tensile strength and tensile adhesive strength increased significantly after thermal aging,the highest increase was respectively 156% and 117%. The al?kali resistance properties of materials was better, tensile properties was unchanged after alkali treatment, while ad?hesion property was degradation after water immersion, the highest tensile adhesive strength decreased 47%. The ultraviolet irradiation accelerated the joint materials aging, including material peeling and cracking. The suggestions of increasing tensile strength limit value after thermal aging and the appearance of the ultraviolet aging to evaluate the aging properties of joint material were proposed.