abstract |
A separator membrane for use in secondary alkali batteries having a non-ion selective hydrophilic group and ion exchange group said membrane having an electrical resistance which, when said membrane is heated in 12NaOH for 30 minutes at a temperature between about 20 DEG and 100 DEG C., varies from the initial value for 20 DEG C. by an amount between 10% and about 24% and the process thereof are herein disclosed. |