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We study 30 proton flares associated with CMEs to probe the temporal relationship between flares and CMEs within cadence of observations, and the connection between the CME dynamics with associated SEP. We employ observations from GOES mission to study the temporal evolution of the flares in X-ray waveband and proton events in different seven energy bands. The CME data has been considered from LASCO/ SOHO mission. We study the temporal characteristics of the flare in 0.5 to 4 Å and 1 to 8 Å. Further, by comparing 1-8 Å flare data with CME dynamics we conclude that both occur together within their temporal resolution limits. The temporal and intensity (flux) characteristics of the proton flares have been studied in seven different energy channels of the GOES ranging between 0.8-500 MeV. We made spectra from temporal observations in each energy band. We consider 3-hour interval to form the spectra in view of count statistics. The spectra for each proton flare event are fitted with least chi-square method. The spectral index (negative power-law index) is derived at every 3-hour interval for a given event. We study growth of spectral index () over time of the proton flare and conclude that time scale of proton acceleration ranges between 15-20 hours. On the other hand the CME velocity is found to be dependent on the integrated proton flux over the rise time. The linear relationship between spectral index and CME velocity reveals that CME produces the shock which accelerates the particles.