please launch google scholar  and NOT google and read this link:

https://www.researchgate.net/profile/Anuvat_Sirivat/publication/5609095_Electrically_controlled_release_of_sulfosalicylic_acid_from_crosslinked_polyvinyl_alcohol_hydrogel/links/574e8f6408ae82d2c6be30a7.pdf

It seems that you are not familiar with web enquiries for research.

JRG

Article Electrically controlled release of sulfosalicylic acid from ...

 Jean Rene Grezes sir,

Thanks for your comment.

I gone through that research article earlier also.

Their i noticed that they are using Sulfosalicyclic acid as a model drug in PVA hydrogel crosslinked with Glutaraldehyde and it is not reported that Sulfosalicyclic acid acts as a crosslinking agent.  

It seems that you are not familiar with the chemistry of crosslinkers and the chemistry of  salycilic acid or sulfosalycilic acid!! Why ???

5-sulfosalicylic acid CANNOT act as crosslinker  for the following reasons:

- COOH   and SO3H  can only bind as acid groups with basic molecules.

- OH    the hydroxyl group can be transformed  into an ester group (R-OH → R-OCOCH3). For details see aspirin synthesis.

Please read this link

Intramolecular crosslinking of poly(vinyl alcohol)

http://doc.utwente.nl/67255/

YOU MUST TRANSFORM  ONE of these groups for the crosslinking of your PVA.

p.e  SO3H in SO3CL, COOH in COCl,  OR ester of OH as OR

Good luck

JRG

Thanks for your Suggestions JRD sir,

I agree with you sir, as per chemistry of cross linking and the nature of Sulfosalicyclic acid it will easily cross links  with PVA and gives good stability too.(i tryed it in my lab)

But i not found any right literature reporting cross linked PVA with Sulfosalicyclic acid, why? is people not worked on this?, or i am not finding that article? or any other science or chemistry that i couldn't understand upto now? it made me bit curious!. So, i posted this question just to confirm it. 

Thank you sir...

According to your answer:

5-sulfosalicylic acid CANNOT act as crosslinker  for the following reasons:

- COOH   and SO3H  can only bind as acid groups with basic molecules.

- OH    the hydroxyl group can be transformed  into an ester group (R-OH → R-OCOCH3). For details see aspirin synthesis.

Can we use 5-Sulfosalicylic acid as a crosslinker for PVA? - ResearchGate. Available from: https://www.researchgate.net/post/Can_we_use_5-Sulfosalicylic_acid_as_a_crosslinker_for_PVA [accessed Feb 20, 2017].

It seems that you don ´t understand that your 5 - sulfosalicylic acid HAS NO GROUPS able to bind covalently when you mix PVA and Your molecule. Only after chemical  transformation of these groups is a crosslinking possible.

JRG