CAJ | 학술논문

为改善酚醛泡沫的耐高温性能，实验将适量的 B2 O3引入酚醛泡沫，经模压成型、固化后，制备出硼改性酚醛泡沫复合材料；研究了硼改性酚醛泡沫复合材料的微观结构，以及不同的硼含量对酚醛泡沫的压缩性能、耐高温性能的影响。结果表明，硼改性酚醛泡沫的压缩断裂特征为假塑性断裂模式；引入适量的B2 O3，可改善树脂基体相的韧性，提高酚醛泡沫复合材料的压缩强度，当 B2 O3含量为质量分数4％时，酚醛泡沫的压缩强度最大，为10.14 MPa，比纯酚醛泡沫提高了5.18％。硼改性有利于酚醛泡沫的高温稳定性，酚醛泡沫的热分解温度和残碳率均随硼含量的增加而有所提高；当 B2 O3含量为质量分数7％时，酚醛泡沫的耐高温性能最优，其失重10％时的热分解温度为447℃，比纯酚醛泡沫提高了76.68％；其800℃下的残碳率为66.37％，较纯酚醛泡沫高出16.05％。
위개선분철포말적내고온성능，실험장괄량적 B2 O3인입분철포말，경모압성형、고화후，제비출붕개성분철포말복합재료；연구료붕개성분철포말복합재료적미관결구，이급불동적붕함량대분철포말적압축성능、내고온성능적영향。결과표명，붕개성분철포말적압축단렬특정위가소성단렬모식；인입괄량적B2 O3，가개선수지기체상적인성，제고분철포말복합재료적압축강도，당 B2 O3함량위질량분수4％시，분철포말적압축강도최대，위10.14 MPa，비순분철포말제고료5.18％。붕개성유리우분철포말적고온은정성，분철포말적열분해온도화잔탄솔균수붕함량적증가이유소제고；당 B2 O3함량위질량분수7％시，분철포말적내고온성능최우，기실중10％시적열분해온도위447℃，비순분철포말제고료76.68％；기800℃하적잔탄솔위66.37％，교순분철포말고출16.05％。
In order to improve high temperature resistance of phenolic foams , B2 O3 was incorporated in it to synthesize boron-modified composites by mold forming and curing .Microstructure of resultant phenolic foams were studied .Effects of boron content on compressive properties and high temperature resistance of phenolic foams are investigated .The results showed that compressive fracture characteristics of boron modified phenolic foams was pseudoplastic .Toughness of resin matrix and compressive strength of phenolic foams could be improved by proper amount of B 2 O3 .The compressive strength of PF-4 is best, 10.14 MPa, 5.18% higher than PF-0.Boron was beneficial to improving high temperature stability of phenolic foams.Thermal decomposition temperature and carbon yield are enhanced with increase of B 2 O3 .PF-7 showed better high temperature stability than others , whose thermal decomposition temperature with 10% weight loss is 447 ℃, 76.68% higher than that of PF-0, and carbon yield is 66.37% at 800 ℃, 16.05%higher than that of PF-0.