Notwithstanding the enormous benefits of medium density fiberboard, free formaldehyde emission and low water resistance are the significant disadvantages to reducing their application. In this research, phenolic compounds such as phenol, 1,2,4-trihydroxy benzene (hydroxyquinol), and 4-tert-butyl catechol in various amounts were added to an industrial-grade liquid urea-formaldehyde polymer in an attempt to alleviate these defects. Medium density fiberboard panels were manufactured from the modified urea-formaldehyde resins. The panels' physical and mechanical properties, such as thickness swelling, water absorption, formaldehyde emission, modulus of rupture, modulus of elasticity, and internal bond strength were then investigated. The results showed that the free formaldehyde emission contents for the modified composite panels ranged from 25.4% to 50.1% lower than for the unmodified panel. Also, the lowest and highest levels of thickness swelling occurred with the medium density fiberboard panels bonded with UF-P1 and the unmodified urea-formaldehyde, respectively. The results clearly showed that the urea-formaldehyde polymer's storage capacity increased substantially with the addition of phenolic derivatives. The produced novel medium density fiberboard results can be said to substantially lower environmental and health hazards associated with these materials and have a beneficial effect on the water transport characteristics exhibited by these materials. Consequently, this research may play a role as a useful stepping-stone for solving the fundamental problems of medium density fiberboard production industries.

尽管中密度纤维板具有巨大的优势，但游离甲醛释放量和耐水性低是减少其应用的显着缺点。本研究将苯酚、1,2,4-三羟基苯（羟基喹啉）和4-叔丁基邻苯二酚等多种酚类化合物添加到工业级液态脲醛聚合物中，试图缓解这些问题。缺陷。中密度纤维板由改性脲醛树脂制成。然后研究了面板的物理和机械性能，例如厚度膨胀、吸水率、甲醛释放量、断裂模量、弹性模量和内部粘合强度。结果表明，改性复合板的游离甲醛释放量为25。比未改性面板低 4% 至 50.1%。此外，分别用 UF-P1 和未改性的脲醛粘合的中密度纤维板面板发生了最低和最高水平的厚度膨胀。结果清楚地表明，随着酚类衍生物的加入，脲醛聚合物的储存容量显着增加。可以说所生产的新型中密度纤维板结果显着降低了与这些材料相关的环境和健康危害，并且对这些材料表现出的水传输特性具有有益影响。因此，这项研究可以作为解决中密度纤维板生产行业基本问题的有用垫脚石。分别用 UF-P1 和未改性脲醛粘合的中密度纤维板面板的厚度膨胀最低和最高。结果清楚地表明，随着酚类衍生物的加入，脲醛聚合物的储存容量显着增加。可以说所生产的新型中密度纤维板结果显着降低了与这些材料相关的环境和健康危害，并且对这些材料表现出的水传输特性具有有益影响。因此，这项研究可以作为解决中密度纤维板生产行业基本问题的有用垫脚石。分别用 UF-P1 和未改性脲醛粘合的中密度纤维板面板的厚度膨胀最低和最高。结果清楚地表明，随着酚类衍生物的加入，脲醛聚合物的储存容量显着增加。可以说所生产的新型中密度纤维板结果显着降低了与这些材料相关的环境和健康危害，并且对这些材料表现出的水传输特性具有有益影响。因此，这项研究可以作为解决中密度纤维板生产行业基本问题的有用垫脚石。