Toughening of polystyrene by natural rubber-based composite particles: Part III Fracture mechanisms

被引:0
作者
M SCHNEIDER
T PITH
M LAMBLA
机构
[1] Institut Charles Sadron (CRM-EAHP),Laboratoire d'Extrusion Reactive
来源
Journal of Materials Science | 1997年 / 32卷
关键词
Cavitation; PMMA; Natural Rubber; Latex Particle; Rubber Particle;
D O I
暂无
中图分类号
学科分类号
摘要
Impact testing has allowed the toughness of PS blends to be correlated with the morphology of the dispersed rubber phase, which was a natural rubber (NR) in particle form, coated with a shell of polystyrene (PS) or polymethylmethacrylate (PMMA). PS subinclusions were also introduced into the NR core. The impact resistance of the prepared PS blends began to rise steeply at a particle content of about 18 wt %. Transmission electron microscopy (TEM) in combination with osmium tetroxide staining techniques, allowed direct analysis of the crazing and cavitation processes in the composite natural rubber particle-toughened PS blends. Bulk samples were studied at high and slow deformation speeds. Different deformation mechanisms were effective, depending on the location of the observed stress-whitened zone relative to the notch tip. The apparent fracture mechanisms in rubber-toughened PS blends were also studied by scanning electron microscopy. PS blends containing polydisperse natural rubber-based particles or monodisperse poly(n-butylacrylate)-based particles, and commercial high-impact polystyrene, were compared.
引用
收藏
页码:5191 / 5204
页数:13
相关论文
共 92 条
[1]  
Turley S. G.(1980)undefined Polymer 21 466-undefined
[2]  
Keskkula H.(1990)undefined Macromolecules 23 3838-undefined
[3]  
Piorkowska E.(1995)undefined Polymer 36 2173-undefined
[4]  
Argon A. S.(1973)undefined J. Appl. Polym. Sci. 17 1173-undefined
[5]  
Cohen R. E.(1996)undefined J. Appl. Polym. Sci. 62 273-undefined
[6]  
Dagli G.(1969)undefined Polym. Eng. Sci. 9 197-undefined
[7]  
Argon A. S.(1966)undefined Polym. Lett. 4 35-undefined
[8]  
Cohen R. E.(1965)undefined J. Electron Micros. 14 220-undefined
[9]  
Lavengood R. E.(1976)undefined J. Mater. Sci. 11 1207-undefined
[10]  
Nicolais L.(1967)undefined Koll-Z.Z. Polym. 220 24-undefined