It is important when using these particular monomers, however, that they are present in the polymer in a mass fraction of {HEAD ~ at least 45%} by weight, so as to give {TAIL ~ a polymer} having the relative permittivity of more than 4.5 as required in accordance with the invention 
It is important when using these particular monomers , however , that they are present in the polymer in a mass fraction of { HEAD ~ at least 45 % } by weight , so as to give { TAIL ~ a polymer } having the relative permittivity of more than 4.5 as required in accordance with the invention
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH