摘要
The CaSO 4 whisker/polyurethane elastomer composites with high strength and high toughness are fabricated.The CaSO 4 whisker reinforcing and toughening mechanisms for polyurethane elastomer are studied.The observation of the fracture surface by SEM and TEM shows that CaSO 4 whisker reinforcing mechanism for polyurethane elastomer is mainly load transfering,while its toughening mechanism involves crack deflection and whisker pullout.The effects of dispersity of CaSO 4 whisker and the interfacial bonding state on reinforcement and toughness are discussed.The results indicate that composites with 5%～10% CaSO 4 whisker exhibit the best mechanical properties among the materials tested.Good bonding interface is formed between whisker and matrix after the surface of CaSO 4 whisker being treated by silane coupling agent(KH 550).Better interfacial bonding state contributes to strength and toughness being fairly improved.
The CaSO 4 whisker/polyurethane elastomer composites with high strength and high toughness are fabricated.The CaSO 4 whisker reinforcing and toughening mechanisms for polyurethane elastomer are studied.The observation of the fracture surface by SEM and TEM shows that CaSO 4 whisker reinforcing mechanism for polyurethane elastomer is mainly load transfering,while its toughening mechanism involves crack deflection and whisker pullout.The effects of dispersity of CaSO 4 whisker and the interfacial bonding state on reinforcement and toughness are discussed.The results indicate that composites with 5%～10% CaSO 4 whisker exhibit the best mechanical properties among the materials tested.Good bonding interface is formed between whisker and matrix after the surface of CaSO 4 whisker being treated by silane coupling agent(KH 550).Better interfacial bonding state contributes to strength and toughness being fairly improved.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2001年第2期245-249,共5页
Acta Polymerica Sinica
关键词
聚氨酯弹性体
补强
增韧
复合材料
硫酸钙晶须
Whiskers, Polyurethane elastomer, Reinforcement and toughness, Composite
