Study on epoxy resins modified by polycarbonate polyurethanes

✍ Scribed by Tonghui Chen; Hansheng Li; Yue Gao; Minlian Zhang

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 319 KB
• Volume: 69
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19980801)69:5<887::aid-app7>3.0.co;2-i

✦ Synopsis

In this article, the structure and properties of the epoxy resin (EP) modified by polyurethane (PU) prepolymers were studied. The three types of polyurethane prepolymers, namely, polycarbonate-type PU (TPC), polyether-type PU, and polycarbonate-polyether-type PU were employed. The samples were analyzed by means of an infrared spectrometer, a differential scanning calorimeter, a scanning electron microscope, a transmission electron microscope, a scanning tunnel microscope, and a thermal gravimeter. The results show that the EP modified by TPC is of excellent thermal resistance and mechanical properties. Specifically, when the ratio of PU to EP is 10/ 100 (wt/wt), optimal properties are achieved.