I have found different sources giving 10 differences in solubility parameters. So, I am wondering if anyone can suggest the exact trustable value for PVDF HSP. I also would appreciate it if somebody share a law according to which HSP vary with temperature.
Jyoti Lavania
According to the standard polymer database, the HSP value of PVDF ranges from 15.4-15.8.
And to answer your second question;
δDT = δD*(1-ΔT*α*1.25)
δPT = δP*(1-ΔT*α/2)
δHT = δH*(1-ΔT*(0.00122+α/2))
where 'a' is thermal expansion coefficient.
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