Poly(1, 3, 4-Oxadiazole-Amide)s Containing Pendent Phenoxy Groups

A series of new poly(1, 3, 4-oxadiazole-amide)s have been synthesized by solution polycondensation of aromatic diamines containing preformed 1, 3, 4-oxadiazole rings with phenoxyterephthalic diacid chloride or by the reaction of the same diacid chloride with p-aminobenzhydrazide resulting in a polyhydrazide-amide which was cyclodehydrated to the corresponding oxadiazolic structure. The new polymers were soluble or partially soluble in polar amidic solvents, were stable up to 375–400 °C in air and had a glass transition temperature in the range of 225–272 °C.

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Synthesis and characterization of new silicon-containing poly(arylene-1,3,4-oxadiazole)s

High Performance Polymers ◽

10.1088/0954-0083/7/4/011 ◽

1995 ◽

Vol 7 (4) ◽

pp. 493-501 ◽

Cited By ~ 18

Author(s):

I Sava ◽

B Schulz ◽

S Zhu ◽

M Bruma

Keyword(s):

Glass Transition ◽

Transition Temperature ◽

Glass Transition Temperature ◽

Synthesis And Characterization ◽

Polycondensation Reaction ◽

Cyclization Process ◽

Film Forming ◽

Temperature Solution ◽

Solution Polycondensation

New silicon-containing aromatic polyhydrazides were synthesized by low-temperature solution polycondensation reaction of bis(p-chlorocarbonylphenyl)diphenylsilane with various aromatic dihydrazides, or of bis(p-carbohydrazidophenyl)diphenylsilane with diacid chlorides. The corresponding poly(arylene-1,3,4-oxadiazole)s wvere prepared by thermal cyclodehydration in the solid state. The cyclization process takes place at temperatures in the range of 250-300 IC. The resulting silicon-containing poly(arylene-1,3,4-oxadiazole)s are soluble in common organic solvents and have good film-forming abilities. They are stable up to 420-480 'C and their glass transition temperature is in the range of 262-278C.

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Fluorinated Poly(Phenylquinoxaline–Imide–Amide)S

High Performance Polymers ◽

10.1088/0954-0083/8/3/009 ◽

1996 ◽

Vol 8 (3) ◽

pp. 445-453 ◽

Cited By ~ 5

Author(s):

C Hamciuc ◽

E Hamciuc ◽

F W Mercer ◽

N M Belomoina ◽

M Bruma

Keyword(s):

Glass Transition ◽

Transition Temperatures ◽

Aromatic Diamines ◽

Polar Solvents ◽

Glass Transition Temperatures ◽

Flexible Films ◽

Diacid Chloride ◽

Methyl Pyrrolidone ◽

Solution Polycondensation

Poly(phenylquinoxaline–imide–amide)s have been synthesized by solution polycondensation of aromatic diamines containing preformed phenylquinoxaline rings with a diacid chloride incorporating preformed imide rings and hexafluoroisopropylidene (6F) groups. These polymers do not decompose up to 400 °C and have glass transition temperatures in the range of 284–308 °C. They are soluble in polar amidic solvents, such as N-methyl-pyrrolidone, and in less polar solvents such as pyridine and tetrahydrofuran, and give flexible films by casting from solutions.

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Polyimides Containing 1,3,4-Oxadiazole Rings

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20081631 ◽

2008 ◽

Vol 73 (12) ◽

pp. 1631-1644 ◽

Cited By ~ 16

Author(s):

Maria Bruma ◽

Mariana-Dana Damaceanu

Keyword(s):

Thermal Stability ◽

Glass Transition ◽

Transition Temperature ◽

Glass Transition Temperature ◽

Main Chain ◽

The Other ◽

Carbonyl Groups ◽

Aromatic Diamines ◽

Film Forming ◽

As Solubility

Two series of polyimides containing 1,3,4-oxadiazole rings in the main chain, one of them having flexible hexafluoropropane-2,2-diyl groups and the other with carbonyl groups, were prepared by polycondensation of aromatic diamines containing 1,3,4-oxadiazole rings with hexafluoropropane-2,2-diyl-bis(phthalic anhydride) or benzophenonetetracarboxylic dianhydride. Their properties, such as solubility in organic solvents, thermal stability, glass transition temperature, photoluminescence and film-forming properties of the two groups of polymers have been studied and compared.

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Study of the crosslinking process in fluorinated poly(imide-amide)s containing pendant cyano groups

High Performance Polymers ◽

10.1088/0954-0083/6/3/001 ◽

1994 ◽

Vol 6 (3) ◽

pp. 183-191 ◽

Cited By ~ 17

Author(s):

M Bruma ◽

F Mercer ◽

B Schulz ◽

R Dietel ◽

J Fitch ◽

...

Keyword(s):

Thermal Stability ◽

Dielectric Constant ◽

Glass Transition ◽

Transition Temperature ◽

Aromatic Diamines ◽

Crosslinking Process ◽

Thermal Crosslinking ◽

Cyano Groups ◽

Poly Imide ◽

Solution Polycondensation

Fluorinated poly(imide-amide)s containing pendant cyano groups have been synthesized by solution polycondensation of aromatic diamines which contain cyano groups with diacid chlorides which have both hexafluoroisopropylidene and imnide groups. Thermal crosslinking of these polymers has been attempted in NMP, or by heating the polymer films up to 370-400 'C. The solubility, thermal stability, glass transition temperature and dielectric constant of both linear and crosslinked polymers have been studied.

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