use other materials to improve the swelling ratio of polymer and  the stability of the membrane (Sensors and Actuators B 196 (2014) 357–369,Synthetic Metals 204 (2015) 39–47),I hope that this information will help you

Thank You very much sir.

Swelling is an essential parameter which influences both mechanical stability and proton conductivity of your polyelectrolyte. Then, you will want to find the lowest ratio as possible between swelling degree and proton conductivity.

Hi Boopathi

Some references on attachment 1

www.sciencedirect.com/science/article/pii/S0005273609003472

2

Article Stability and Degradation Mechanisms of Radiation-Grafted Po...

3

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwiVkpyAsobXAhXCJFAKHc21CSIQFgg3MAI&url=http%3A%2F%2Fonlinelibrary.wiley.com%2Fdoi%2F10.1002%2Faenm.201300489%2Fabstract&usg=AOvVaw1kha61Pm6SraAx3P5rWKKi

4

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0ahUKEwiVkpyAsobXAhXCJFAKHc21CSIQFghAMAM&url=http%3A%2F%2Fonlinelibrary.wiley.com%2Fdoi%2F10.1002%2Ffuce.201400024%2Fabstract&usg=AOvVaw0dJsAL-UbFlgHJi_cH3oil

5

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&uact=8&ved=0ahUKEwiVkpyAsobXAhXCJFAKHc21CSIQFghJMAQ&url=http%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS0378775317311849&usg=AOvVaw09rCv4u3-wRsGLHFs0enWR

6

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=6&cad=rja&uact=8&ved=0ahUKEwiVkpyAsobXAhXCJFAKHc21CSIQFghMMAU&url=http%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS0013468606011613&usg=AOvVaw2OCXLBWmeDAwfMYoG4lH0p

7

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&cad=rja&uact=8&ved=0ahUKEwiVkpyAsobXAhXCJFAKHc21CSIQFghVMAY&url=https%3A%2F%2Fwww.scientific.net%2FAMM.260-261.443&usg=AOvVaw1n871TK604cXGW13L1lwQM

8

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=8&cad=rja&uact=8&ved=0ahUKEwiVkpyAsobXAhXCJFAKHc21CSIQFghaMAc&url=https%3A%2F%2Fwww.nature.com%2Fpj%2Fjournal%2Fv41%2Fn2%2Fpdf%2Fpj200918a.pdf%3Forigin%3Dppub&usg=AOvVaw2Dg9mRR_k0CGiHq1KIHvpO

9

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=9&cad=rja&uact=8&ved=0ahUKEwiVkpyAsobXAhXCJFAKHc21CSIQFghfMAg&url=http%3A%2F%2Felib.dlr.de%2F104772%2F1%2F5Analysis%2520of%2520the%2520Influence%2520of%2520Temperature%2520and%2520Gas%2520Humidity%2520on%2520the%2520Performance%2520Stability%2520of%2520Polymer%2520Electrolyte%2520Membrane%2520Fuel%2520Cells.pdf&usg=AOvVaw0KnhMZKZJm-MARakABLD5W

10

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=10&cad=rja&uact=8&ved=0ahUKEwiVkpyAsobXAhXCJFAKHc21CSIQFghkMAk&url=https%3A%2F%2Fwww.beilstein-journals.org%2Fbjnano%2Farticles%2F6%2F8&usg=AOvVaw2tlHIPIjkD3WMalaluZnQu

11

https://books.google.com/books?id=7OMcQ6y4Z8cC&pg=PA154&lpg=PA154&dq=polymer+electrolyte+effect+on+the+stability+of+the+membrane&source=bl&ots=Qlmk6cyEA-&sig=yPgNyYHe6-Lep90sfT9DL21ZwRY&hl=en&sa=X&ved=0ahUKEwj99duKs4bXAhVPZlAKHZuvBPQ4ChDoAQgmMAA

12

https://books.google.com/books?id=Pg_ZDgAAQBAJ&pg=PA339&lpg=PA339&dq=polymer+electrolyte+effect+on+the+stability+of+the+membrane&source=bl&ots=i1-1Z33XOz&sig=9EQujdn1R8f-X-CNSMeqitJDtXg&hl=en&sa=X&ved=0ahUKEwj99duKs4bXAhVPZlAKHZuvBPQ4ChDoAQgoMAE

13

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=13&cad=rja&uact=8&ved=0ahUKEwj99duKs4bXAhVPZlAKHZuvBPQ4ChAWCCowAg&url=https%3A%2F%2Fwww.sintef.no%2Fglobalassets%2Fproject%2Fnovel%2Fpdf%2Fposter%2Fstability-of-radiation-grafted-polymer-electrolyte-membranes-for-water-electrolysis-cells.pdf&usg=AOvVaw0cy0SWd8Iws3Qfg_PmXqjm

14

https://books.google.com/books?id=v3J3CAAAQBAJ&pg=PA78&lpg=PA78&dq=polymer+electrolyte+effect+on+the+stability+of+the+membrane&source=bl&ots=6mtBM1H930&sig=u_aQeuJMU1VmG1Q_ZKmCOMvTFNY&hl=en&sa=X&ved=0ahUKEwj99duKs4bXAhVPZlAKHZuvBPQ4ChDoAQgvMAM

15

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=15&cad=rja&uact=8&ved=0ahUKEwj99duKs4bXAhVPZlAKHZuvBPQ4ChAWCDEwBA&url=http%3A%2F%2Fjes.ecsdl.org%2Fcontent%2F163%2F11%2FF3125.full&usg=AOvVaw0rAWze_sLuslgld8nzCYfL

16

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=16&cad=rja&uact=8&ved=0ahUKEwj99duKs4bXAhVPZlAKHZuvBPQ4ChAWCDcwBQ&url=https%3A%2F%2Flink.springer.com%2Farticle%2F10.1007%2Fs10008-016-3448-4&usg=AOvVaw3ke4DdvGanjgsOgmvxPBZm

17

https://books.google.com/books?id=corDCgAAQBAJ&pg=PA486&lpg=PA486&dq=polymer+electrolyte+effect+on+the+stability+of+the+membrane&source=bl&ots=0ih7Rt4uwB&sig=Jid7D5UWYsgko62Vq4rnj5y2J6w&hl=en&sa=X&ved=0ahUKEwj99duKs4bXAhVPZlAKHZuvBPQ4ChDoAQg7MAY

18

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=18&cad=rja&uact=8&ved=0ahUKEwj99duKs4bXAhVPZlAKHZuvBPQ4ChAWCD0wBw&url=http%3A%2F%2Fwww.engr.uconn.edu%2F~jmfent%2FCHEG320_ionomeric%2520membrane%2520lectures.pdf&usg=AOvVaw3RtlRwaO8piFpgdxgybHkQ

19

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=19&cad=rja&uact=8&ved=0ahUKEwj99duKs4bXAhVPZlAKHZuvBPQ4ChAWCEMwCA&url=https%3A%2F%2Fgrupos.unican.es%2Fpasep%2Fpublications%2F2014%2F1_2014.pdf&usg=AOvVaw165k9v3QJGlZTSPd-HHImJ

20

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=20&cad=rja&uact=8&ved=0ahUKEwj99duKs4bXAhVPZlAKHZuvBPQ4ChAWCEswCQ&url=https%3A%2F%2Fwww.psi.ch%2Flec%2FThesesEN%2FM_Slaski_.pdf&usg=AOvVaw0-2ypr3UOO2SJsYLJhapu3