import pandas as pd

def slice_df(df, slice_positions):
    sliced_dfs = [df[:slice_positions[0]-1].copy(deep=True)]
    for i in range(len(slice_positions)-1):
        sliced_dfs.append(df[slice_positions[i]-1:slice_positions[i+1]-1].copy(deep=True))
    sliced_dfs.append(df[slice_positions[-1]-1:].copy(deep=True))
    return sliced_dfs