摘要
通过对 PSF/环氧共混体系剥离强度、DMA及 SEM断口图象的分析研究 ,揭示了共混体系相结构演变与脆韧转变的对应关系和增韧机理。研究表明 ,当共混体系形成较均匀完整的 PSF连续网膜包覆环氧球粒分散相结构 ,并且网膜厚度小于 0 .0 4μm时 ,体系呈现高韧性 ,此时体系由断面上高韧性的 PSF网膜产生大量的塑性变形吸收能量而使体系增韧 ,不同于传统“海岛结构”的增韧结构和机理 。
The relationship between the phase structure of PSF/epoxy blend system and brittle/ductile transition was investigated, and the toughening mechanism was analyzed by studying the peeling strength of PSF/epoxy system, DMA and SEM fracture morphology. The results show that the blend system demonstrates good toughness when dispersed epoxy particles are covered by the continuous PSF network film homogeneously, and the thickness of the film is less than 0.04μm. Meanwhile the plastic strain produced in the ductile PSF film on fracture makes the system more flexible, and a toughened structure and toughening mechanism are different from that of traditional “sea island” structure. This result is of significance to develop resin matrix with excellent toughness of advanced composites and structural adhesives.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2000年第1期42-45,共4页
Acta Materiae Compositae Sinica
