Dissolution behaviour of polyethersulfone in diglycidyl ether of bisphenol-A epoxy resins

2017 Global Conference on Polymer and Composite Materials

材料科学;化学

Zhou, J.L.^1 ; Cheng, C.^1 ; Zhang, H.^1 ; Sun, Z.Y.^2 ; Zhu, S.^2 ; Yu, M.H.^1,2

College of Materials Science and Engineering, Donghua University, Shanghai

201620, China^1

Center for Civil Aviation Composites, Shanghai

201620, China^2

关键词: Diglycidyl ether of bisphenol-A;    Dissolution behaviour;    Dissolution temperature;    Good compatibility;    Homogeneous solutions;    Increasing temperatures;    Oligomer molecules;    Turbidity measurements;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/213/1/012038/pdf
DOI  :  10.1088/1757-899X/213/1/012038

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Polyethersulfone (PES) is considered as an important and useful toughener for epoxy resins (EPs). Generally, PES was first dissolved in EP oligomer to form a homogeneous solution, which considerably affected the properties of cured EPs. Turbidity measurement was carried out to characterize the dissolution behaviour. Different PES/EP systems exhibited the same dissolution behaviour, albeit different swelling rate (RS) and dissolution rate (RD). Compared to molecular weight, the particle size and hydroxyl content of PES exerted considerable effects on dissolution. The smaller epoxy equivalent these diglycidyl ether of bisphenol-A (DGEBA) oligomers possessed, the better dissolubility they had; the more small molecules they contained, the more apparent the swelling observed. Moisture prevented the diffusion of the DGEBA oligomer molecules into PES. With increasing temperature, RSand RDfirst rapidly increased and then slowly increased, and the optimal dissolution temperature was 120C. At the final steady, the turbidity increased linearly with increasing PES concentration; in addition, these values can be used as reference for homogeneous solution. Only one glass transition temperature (Tg) was observed for PES/EP systems, indicative of the good compatibility between PES and EP.