Linear and branched polyimide composition

A polyimide composition comprising:

• 70 to 99 weight percent of a first polyimide, based on a total weight of the polyimide composition, wherein the first polyimide is a linear polyimide;
• and
• 1 to 30 weight percent of a second polyimide, based on the total weight of the polyimide composition, wherein the second polyimide is a branched polyimide of the formula
• wherein
• the second polyimide is prepared by:
• imidization of:
• a dianhydride, and
• a combination of a polyamine and an organic diamine, or
• the second polyimide is prepared by:
• imidization of
• an anhydride, and
• a combination of a polyamine and an organic diamine to form bis(phthalimide)s, and
• reaction of
• the bis(phthalimide)s, and
• an alkali metal salt of a dihydroxy aromatic compound,
• wherein the polyamine is present in an amount of 0.1 to 20 mol %, based on total moles of amine functionality of the combination of the polyamine and the organic diamine,
• G is a group derived from the polyamine, wherein t is 3 to 6,
• each Q is independently the same or different, and is a divalent C1-60 hydrocarbon group comprising carbon and hydrogen, optionally with 1 to 3 heteroatoms,
• each M is independently the same or different, and is —O—, —C(O)—, —OC(O)—, —OC(O)O—, —NHC(O), —(O)CNH—, —S—, —S(O)—, or —S(O)2—,
• D is a phenylene,
• each V is independently the same or different, and is a tetravalent C4-40 hydrocarbon group comprising carbon and hydrogen, optionally with 1 to 3 heteroatoms,
• each R is independently the same or different, and is a C1-20 divalent hydrocarbon group comprising carbon and hydrogen, optionally with 1 to 3 heteroatoms,
• q is 0 or 1, m is 0 or 1, d is 0 or 1, and p is 1 or 2,
• each n is independently the same or different, and is 1 to 1,000, provided that the total of all values of n is greater than 4,
• wherein the first polyimide and the second polyimide are different, and
• wherein the polyimide composition has
• a melt flow rate of at least 19 grams per 10 minutes, wherein the melt flow rate is greater than a melt flow rate of the first polyimide and greater than a melt flow rate of the second polyimide, each when measured at 337° C. at a shear load of 6.7 kg, in accordance with ASTM 1238,
• an apparent viscosity of less than 330 Pascal second, wherein the apparent viscosity is less than an apparent viscosity of the first polyimide and less than an apparent viscosity of the second polyimide, each when measured at 380° C. at a shear rate of 640 inverse seconds, in accordance with ISO 11443,
• a notched Izod impact strength that is greater than at least one of a notched Izod impact strength of the first polyimide or a notched Izod impact strength of the second polyimide, each when measured at 23° C. in accordance with ASTM D256, and
• a glass transition temperature of greater than 100° C., as determined by differential scanning calorimetry.