Premium
Investigating the Effects of Chloramines on Elastomer Degradation
Author(s) -
Reiber Steve
Publication year - 1993
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1993.tb06047.x
Subject(s) - elastomer , chloramine , ultimate tensile strength , chlorine , swelling , materials science , degradation (telecommunications) , cracking , composite material , metallurgy , telecommunications , computer science
Evaluating elastomer degradation involved an accelerated life cycle testing protocol whereby sets of tension‐mounted coupons were exposed to specific chlorine and ammonia concentrations at elevated temperature. The coupons were inspected regularly for evidence of oxidative degradation and cracking. After a set exposure period, the coupons were assessed for tensile performance, swelling, and surface characterization. With few exceptions, solutions of chloramines produced greater elastomer swelling, deeper and denser surface cracking, more rapid loss of elasticity, and greater loss of tensile strength than equivalent concentrations of free chlorine. Elastomers most susceptible to attack were those formulated with natural or synthetic isoprenes.