Mechanical Properties and Morphology Studies of Thermosets from a Liquid-Crystalline Epoxy Resin with Biphenol and Aromatic Ester Groups

✍ Scribed by Yin-Ling Liu; Zhi-Qi Cai; Wei-Cheng Wang; Xiufang Wen; Pihui Pi; Dafeng Zheng; Jiang Cheng; Zhuoru Yang

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 901 KB
• Volume: 296
• Category: Article
• ISSN: 1438-7492
• DOI: 10.1002/mame.201000270

✦ Synopsis

Abstract

Liquid‐crystalline epoxy thermosets were prepared by adding M1 into DGEBA/DDM blends. M2 was added to DGEBA/DDM to produce thermosets for comparison. The influences of the concentration and chemical structure on the mechanical and thermal properties were investigated systematically. The M1/DGEBA blends possessed increased rubbery plateau modulus, higher glass transition temperatures, and lower tan δ. The use of small amounts of M1 may improve the mechanical properties greatly. Izod notched impact strength could be enhanced by 55% by addition of 2% M1 compared to unmodified DGEBA blends. Extremely rough and highly deformed fracture surface could be obtained in the M1/DGEBA blends. M1/DGEBA blends also exhibited excellent thermal properties. magnified image