Epoxy-based composite adhesives with improved lap shear strengths at high temperatures for steel-steel bonded joints

被引：10
作者：
Chailee, Orawan [1 ]
Parnklang, Tewarak [2 ]
Mora, Phattarin [1 ]
Pothisiri, Thanyawat [3 ]
Jubsilp, Chanchira [4 ]
Rimdusit, Sarawut [1 ]
机构：
[1] Chulalongkorn Univ, Fac Engn, Res Unit Polymer Mat Med Practice Devices, Dept Chem Engn, Phayathai Rd, Bangkok 10330, Thailand
[2] King Mongkuts Univ Technol North Bangkok, Dept Ind Chem, Fac Sci Appl, Bangkok, Thailand
[3] Chulalongkorn Univ, Dept Civil Engn, Civil Engn Lab, Fac Engn, Bangkok, Thailand
[4] Srinakharinwirot Univ, Dept Chem Engn, Fac Engn, Nakhon Nayok, Thailand
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2020年 / 137卷 / 44期
关键词：
adhesives; degradation; glass transition; mechanical properties; thermal properties; MECHANICAL-BEHAVIOR; SILICA; RESIN; TRANSITION; NANOPARTICLES; ENHANCEMENT; KINETICS;
D O I：
10.1002/app.49371
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
High-performance room temperature-cure epoxy structural adhesives utilizing simplified formulation are developed. The developed structural adhesive consists of diglycidyl ether of bisphenol A (DGEBA) and novolac epoxy blend as a base resin, micrometer-sized silica particles as a reinforcing filler, and triethylenetetramine as a curing agent. The developed ambient temperature-cure epoxy structural adhesive with optimized formulation exhibits outstanding properties including high glass transition temperature of 95 degrees C, high thermal stability with degradation temperature at 5% weight loss of 364 degrees C, exceptionally high rubbery plateau modulus of 320 MPa, good flame-retardant characteristics with limiting oxygen index of 40, and high single lap shear strength for single lap steel-steel bonded joint of 548 MPa at the temperature of 80 degrees C. The silica-filled DGEBA/novolac epoxy composite adhesive is a potential candidate for applying as a structural adhesive for construction with long-term durability.
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页数：11
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