Dependence of solid particle erosion on the cross-link density in an epoxy resin modified by hygrothermally decomposed polyurethane

作者：Barkoula NM; Gremmels J; Karger Kocsis J^*

来源：Wear, 2001, 247(1): 100-108.

DOI：10.1016/S0043-1648(00)00529-9

• modified epoxy resin (EP)
• solid particle erosion
• cross-link density
• fracture energy
• failure behaviour

Solid particle erosion of epoxy resin (EP) modified by various amounts of hygrothermally decomposed polyester-urethane (HD-PUR) was studied at oblique (30, 45, and 600) and normal impact (90 degrees). The cross-linked structure of the modified EP was characterised by the mean molecular weight between cross-links (M-c). It was established that the initial brittle erosion of the densely cross-linked EPs (M-c less than or equal to 200 g/mol) changed to a rubbery one by increasing HD-PUR modification due to which a less cross-linked network was formed (Mc > 1000 g/mol). This change was reflected by the impact angle dependence: compositions of low M-c showed the minimum resistance at normal (90 degrees), whereas those of high M-c at 30 degrees impact angle. The resistance to solid particle erosion changed linearly with increasing fracture

• 出版日期2001-1