Premium
Synthesis and Properties of Novel Fluorinated Poly(phenylene‐ co ‐imide)s
Author(s) -
Li Wenmu,
Zhang Suobo,
Chen Guang,
Zhang Quanyuan
Publication year - 2007
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200600461
Subject(s) - barrer , oxygen permeability , materials science , copolymer , polymer chemistry , ultimate tensile strength , solubility , polymer , glass transition , membrane , gas separation , solvent , imide , oxygen , composite material , chemistry , organic chemistry , biochemistry
A new class of high‐performance materials, fluorinated poly(phenylene‐ co ‐imide)s, were prepared by Ni(0)‐catalytic coupling of 2,5‐dichlorobenzophenone with fluorinated dichlorophthalimide. The synthesized copolymers have high molecular weights ( $\overline M _{\rm w}$ = 5.74 × 10 4 –17.3 × 10 4 g · mol −1 ), and a combination of desirable properties such as high solubility in common organic solvent, film‐forming ability, and excellent mechanical properties. The glass transition temperature ( T g s) of the copolymers was readily tuned to be between 219 and 354 °C via systematic variation of the ratio of the two comonomers. The tough polymer films, obtained by casting from solution, had tensile strength, elongation at break, and tensile modulus values in the range of 66.7–266 MPa, 2.7–13.5%, and 3.13–4.09 GPa, respectively. The oxygen permeability coefficients ( $P_{{\rm O}_{\rm 2} }$ ) and permeability selectivity of oxygen to nitrogen ( $P_{{\rm O}_{\rm 2} } /P_{{\rm N}_{\rm 2} }$ ) of these copolymer membranes were in the range of 0.78–3.01 barrer [1 barrer = 10 −10 cm 3 (STP) cm/(cm 2 · s · cmHg)] and 5.09–6.25, respectively. Consequently, these materials have shown promise as engineering plastics and gas‐separation membrane materials.