关键词: 钢结构防火卷材, 三元乙丙橡胶, 氯化聚乙烯, 防火性能, 低密度聚乙烯

Abstract: In this work, a type of fireresistant coiled materials used as for steel structure protection was prepared by using lowdensity polyethylene (PE-LD), ethylenepropylenedienemonomer rubber (EPDM) and chlorinated polyethylene (CPE) as base materials. The influence of base materials on the performance of fireresistant coiled materials was investigated. The results indicated that the fireresistant coiled materials achieved better fire resistance, higher tensile strength and greater elongation at break when CPE was used as a base material, whereas they exhibited lower flexural strength and modulus when EPDM was used as a base material. When a compound of CPE and EPDM was used as base materials at a weight ratio of 6：4, the fireresistant coiled materials not only gained an expansion ratio of 22 and good fire resistance but also achieved much better mechanical properties in terms of tensile strength of 2.31 MPa, elongation at break of 855.47 %, flexural strength of 5.47 MPa and flexural modulus of 6.11 MPa. It is concluded that the compound of CPE and EPDM was more suitable as a based material for preparation of the fireresistant coiled materials due to the advantage of intumescent flame retardancy.

Key words: fire-resistant coiled materials for steel structure protection, ethylene-propylene-diene monomer rubber, chlorinated polyethylene, fire-resistant performance, low-density polyethylene