Hello dear, I recommend you that you make measure of acid values during the synthesis of your material because this determination from theoretical values it is not exact, please remember that your reagents are not small molecules and during the synthesis the diffusion process is very important and the extraction the water may decrease with increasing of viscosity of the reaction system. Best regards

Thank you sir @Edwin A. Murillo for your precious time. I have started my experiments but the reaction results in gel often and didn't get expected conversion. But during my literature survey I came across one patent which gives the factor contributing to the gelling. I have attached those files in the answer. So can you guide me that will it be helpful for my research?