| Abstrakt: |
In the modern market of space launches, a clear demand for launch vehicles of light and ultralight classes for the prompt delivery of small-sized payloads into orbit formed. The solution to this problem lies in the search for new alternative structural materials that will ensure low cost and reliability of launches. This article substantiates the possibility of using polyethylene and polypropylene as an alternative material for the manufacture of shells of autophage rockets. In the work, based on the data known in the literature, the physical-mechanical, thermophysical and thermal properties, the advantages and disadvantages of these polymer materials analyzed. Four types of polyethylene (LDPE, HDPE, UHMWPE, PE-X), as well as three types of polypropylenes (PP, iso- and syndiotactic PP) considered. It is shown that, according to their mechanical and thermophysical characteristics, HDPE, UHMWPE, PEX, PP have prospects for use as alternative structural materials for ultralight launch vehicles. The selected types of polyolefins characterized by high physical and mechanical characteristics and sufficiently high thermal properties. Further research of the characteristics of selected grades of polyolefins planned, considering the conditions of their operation as part of autophage rockets. [ABSTRACT FROM AUTHOR] |
