Vinylidene substituted aromatic monomer and cyclic (meth)acrylate ester polymers

A composition, comprising at least one copolymer comprising:

• a) from about 20 to about 90 percent by weight of one or more vinylidene substituted aromatic compounds;
• b) from about 10 to about 80 percent by weight of one or more polycyclic (meth)acrylate esters;
• c) from about 0 to about 40 percent by weight of one or more unsaturated nitriles;
• and,
• d) from about 0 to 60 percent by weight of one or more alkyl (meth)acrylates;
• wherein the weight percentage is based on the weight of the copolymer and the copolymer has a weight average molecular weight of about 120,000 g/Mole or greater and a glass transition temperature of about 100° C. or greater wherein the molecular weight is determined by gel permeation chromatography using polystyrene standards and the glass transition temperature is determined using differential scanning calorimetry;
• with the proviso that one or more of the following features is present:
• the copolymer contains about 1 percent by weight or greater of one or more unsaturated nitriles;
• the copolymer contains about 1 percent by weight or greater of one or more straight chain alkyl acrylates;
• the composition contains one or more impact modifiers;
• or,
• the composition contains one or more mold release agents or fibers.