Testing of Candidate Polymeric Materials for Compatibility with Pure Alternate Pretreat as Part of the Universal Waste Management System (UWMS)

Wingard, C D

关键词: LOW EARTH ORBITS;    POLYMER MATRIX COMPOSITES;    COMPATIBILITY;    WASTE MANAGEMENT;    PRETREATMENT;    AEROSPACE SYSTEMS;    ASTRONAUTS;    PHOSPHORIC ACID;    URINE;    CHROMIUM OXIDES;    OXIDIZERS;    TEFLON (TRADEMARK);    PEEK;    FLUOROPOLYMERS;    FLUOROCARBONS;   

RP-ID  :  NASA/TP-2018-219853,M-1455

学科分类：材料科学（综合）

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

The Universal Waste Management System (UWMS) is an improved Waste Collection System for astronauts living and working in low Earth orbit spacecraft. Polymeric materials used in water recovery on International Space Station are regularly exposed to phosphoric acid-treated 'pretreated' urine. Polymeric materials used in UWMS are not only exposed to pretreated urine, but also to concentrated phosphoric acid with oxidizer before dilution known as 'pure pretreat.' Samples of five different polymeric materials immersed in pure pretreat for 1 year were tested for liquid compatibility by measuring changes in storage modulus with a dynamic mechanical analyzer.