polypus polyp Polypropylence single silk fiber polypropylene fiber wire-cloth polypeptide from Chlamys farreri Polypropylene/Talc Composites polypase series commutator motor polypropylene with low melt index polypropylene cotton blended yarn Polypoidal choroidal vasculopathy Polyphenols in Ilex paraguarensis polypropylene/montmorillonites