Assertion: polymer's unit | /r/HasProperty | iivinylidene fluoride
Facets:
Source sentences:
text: The most preferable fluoroelastomers contain copolymerized units of (i) vinylidene fluoride and hexafluoropropylene; (ii) vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene; (iii) tetrafluoroethylene and propylene; or (iv) tetrafluoroethylene, propylene; and vinylidene fluoride.