38557-26-5

Upstream product

• 1194-65-6 2,6-dichloro-benzonitrile 
• 123-30-8 4-amino-phenol 
• 97027-19-5 2-chloro-6-(4-aminophenoxy)benzonitrile 
• 591-27-5 m-Hydroxyaniline 

Relevant academic research and scientific papers

Poly(amide imide)s containing functional nitrile groups for high performance materials

Novel poly(amide imide)s containing functional nitrile groups were prepared by one step polycondensation reaction of two new diacid chlorides having nitrile substituents with various aromatic diamines incorporating flexible ether bridges. The polymers wer

Benzoxazine-containing nitrile resin curing agent and preparation method and application thereof

The invention discloses a benzoxazine-containing nitrile resin curing agent and a preparation method and application thereof, wherein the structural formula of the curing agent is shown I. The preparation method comprises the following steps: 2, 6 - dichl

Synthesis and characterization of unsymmetrical benzonitrile-containing polyimides: Viscosity-lowering effect and dielectric properties

A new unsymmetrical diamine, 2-(3-aminophenoxy)-6-(4-aminophenoxy) benzonitrile (3,4-APBN), is synthesized via two consecutive SNAr reactions and the temperature-dependent reactivity of the fluorides in 2,6-difluorobenzonitrile, whose first SNAr reaction occurs at 70 °C and second, at 100 °C, allowing timing control of reaction sequence and circumventing the transetherification side reaction. Thus, a series of polyimides (PIs) is prepared from the polymerization of 3,4-APBN with five common dianhydrides (6FDA, DSDA, OPDA, BTDA, and PMDA). For comparison, a second series is also prepared from two symmetrical diamines ([2,6-bis(3-aminophenoxy) benzonitrile (3,3-APBN) and 2,6-bis(4-aminophenoxy)benzonitrile (4,4-APBN)] and 6FDA or PMDA. The processability of the poly(amic acids) (PAAs), for the first series is greatly improved since their solution viscosities are much lower than PAAs based on symmetrical diamines. Besides having high glass-transition temperatures (249-332 °C), and thermal stability [5% weight loss in the range of 505-542 °C (air) and 512-546 °C (nitrogen)], these PIs form tough, transparent and flexible films that have a tensile-strength range of 82.1-121.3 MPa, elongations-at-break of 5.33-9.81%, and tensile moduli of 2.11-2.97 GPa. Their film dielectric constants are 3.08-3.62 at 10 kHz, moderately higher than that (2.92) of analogous PI (CP2) without nitrile groups. Overall, we found that the reduction of structural symmetry in repeat units can improve the polymer processibility as well as increasing their dielectric constants. Copyright

Synthesis and characterization of some poly(amide-imide)s by direct polycondensation

Po1y(amide-imide)s have been synthesized by direct polycondensation reaction of various aromatic diamines with a dicarboxylic acid containing preformed imide cycles. These polymers are easily soluble in polar amidic solvents such as N-methylpyrrolidinone

New polyimides containing siloxane groups in the main chain

A series of polyimides and intermediate polyamidic acids has been synthesized by solution polycondensation reaction at high temperature of aromatic diamines containing flexible hexafluoroisopropylidene groups or cyano substituents with a dianhydride conta

Silicon-containing aromatic poly(amide-imide)s

Silicon-containing poly(amide-imide)s have been synthesized by polycondensation reaction of various aromatic diamines with a dicarboxylic acid or a diacid dichloride containing the dimethylsilylene group and preformed imide cycles. These polymers are easily soluble in polar amidic solvents such as N-methylpyrrolidinone (NMP) or dimethylformamide (DMF) and can be cast into thin flexible films or coatings from such solutions. They show medium to high average molecular weights, high thermal stability, with initial decomposition temperature being above 400°C and glass transition temperature in the range of 220-280°C.

Aromatic polyimides containing polar nitrile groups

A series of polyimides containing nitrile groups has been synthesized by solution polycondensation reaction of two aromatic diamines having nitrile group and two ether linkages with various aromatic dianhydrides, namely 4,4'-oxidiphthalic dianhydride, ben