초록 ▼

Phenylethynyl containing reactive additives were prepared from aromatic diamines containing phenylethynyl groups and various ratios of phthalic anhydride and 4-phenylethynylphthalic anhydride in glacial acetic acid to form the imide in one step or in N-methyl-2-pyrrolidinone to form the amide acid i

Phenylethynyl containing reactive additives were prepared from aromatic diamines containing phenylethynyl groups and various ratios of phthalic anhydride and 4-phenylethynylphthalic anhydride in glacial acetic acid to form the imide in one step or in N-methyl-2-pyrrolidinone to form the amide acid intermediate. The reactive additives were mixed in various amounts (10% to 90%) with oligomers containing either terminal or pendent phenylethynyl groups (or both) to reduce the melt viscosity and thereby enhance processability. Upon thermal cure, the additives react and become chemically incorporated into the matrix and effect an increase in crosslink density relative to that of the host resin. This resultant increase in crosslink density has advantageous consequences on the cured resin properties such as higher glass transition temperature and higher modulus as compared to that of the host resin.

대표청구항 ▼

1. A cured film formed by adding a phenylethynyl reactive additive to a host phenylethynyl containing polymer, wherein the phenylethynyl reactive additive has a molecular weight less than approximately 1000 g/mol and is selected from the group consisting of amide acid phenylethynyl reactive additive

1. A cured film formed by adding a phenylethynyl reactive additive to a host phenylethynyl containing polymer, wherein the phenylethynyl reactive additive has a molecular weight less than approximately 1000 g/mol and is selected from the group consisting of amide acid phenylethynyl reactive additives and imide phenylethynyl reactive additives.