Testing of candidate polymeric materials for compatibility with pure alternate pretreat as part of the universal waste management system (UWMS) | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

5097900

Reference Type

Technical Report

Title

Testing of candidate polymeric materials for compatibility with pure alternate pretreat as part of the universal waste management system (UWMS)

Author(s)

Wingard, CD

Year

2018

Language

English

Abstract

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.