hello guys,, i need to improve the grammar below

it can be seen that the porosity of samples with RCF are higher than samples without RCF, that can be due to the presence of RCF in these samples (bad grammar).RCF can act as a hydrophilic substance which makes the composites more hydrophilic and that leads to increase the weight gain of these samples and leads to high volumes of porosities (poor grammar).

and this is too
it was observed an increasing in viscosity which made a difficulty in resin degassing and dispersion of the nanoclay particles, resulting a Reduction in strength and strain (Bad Grammar).