A polymerizable composition comprising: a) a monomer mixture comprising i) a first monomer of Formula wherein each R1 is independently hydrogen, halo, alkyl, aryl, alkaryl, or aralkyl; each R2 is independently hydrogen, alkyl, alkoxy, aryl, alkaryl, aralkyl, hydroxyl, combines with a R3 connected to a same carbon atom to form a cyclic alkyl, combines with a R3 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings, or combines with R3 and the carbon atom to which both R2 and R3 are connected to form a carbonyl group; each R3 is independently hydrogen, alkyl, alkoxy, aryl, alkaryl, aralkyl, hydroxyl, combines with a R2 connected to a same carbon atom to form a cyclic alkyl, combines with a R2 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings, combines with R2 and the carbon to which both R2 and R3 are connected to form a carbonyl group, or combines with R4 connected to adjacent carbon atom to form a carbon-carbon bond; and each R4 is independently hydrogen or combines with R3 connected to an adjacent carbon atom to form a carbon-carbon bond; and ii) a second monomer that is styrene, styrene substituted with one or more alkyl groups, alkyl (meth)acrylate, or a combination thereof, wherein the first monomer of Formula is present in an amount up to 25 mole percent based on moles of the second monomer; and b) a free radical initiator. a) a monomer mixture comprising i) a first monomer of Formula wherein each R1 is independently hydrogen, halo, alkyl, aryl, alkaryl, or aralkyl; each R2 is independently hydrogen, alkyl, alkoxy, aryl, alkaryl, aralkyl, hydroxyl, combines with a R3 connected to a same carbon atom to form a cyclic alkyl, combines with a R3 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings, or combines with R3 and the carbon atom to which both R2 and R3 are connected to form a carbonyl group; each R3 is independently hydrogen, alkyl, alkoxy, aryl, alkaryl, aralkyl, hydroxyl, combines with a R2 connected to a same carbon atom to form a cyclic alkyl, combines with a R2 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings, combines with R2 and the carbon to which both R2 and R3 are connected to form a carbonyl group, or combines with R4 connected to adjacent carbon atom to form a carbon-carbon bond; and each R4 is independently hydrogen or combines with R3 connected to an adjacent carbon atom to form a carbon-carbon bond; and ii) a second monomer that is styrene, styrene substituted with one or more alkyl groups, alkyl (meth)acrylate, or a combination thereof, wherein the first monomer of Formula is present in an amount up to 25 mole percent based on moles of the second monomer; and i) a first monomer of Formula wherein each R1 is independently hydrogen, halo, alkyl, aryl, alkaryl, or aralkyl; each R2 is independently hydrogen, alkyl, alkoxy, aryl, alkaryl, aralkyl, hydroxyl, combines with a R3 connected to a same carbon atom to form a cyclic alkyl, combines with a R3 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings, or combines with R3 and the carbon atom to which both R2 and R3 are connected to form a carbonyl group; each R3 is independently hydrogen, alkyl, alkoxy, aryl, alkaryl, aralkyl, hydroxyl, combines with a R2 connected to a same carbon atom to form a cyclic alkyl, combines with a R2 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings, combines with R2 and the carbon to which both R2 and R3 are connected to form a carbonyl group, or combines with R4 connected to adjacent carbon atom to form a carbon-carbon bond; and each R4 is independently hydrogen or combines with R3 connected to an adjacent carbon atom to form a carbon-carbon bond; and each R1 is independently hydrogen, halo, alkyl, aryl, alkaryl, or aralkyl; each R2 is independently hydrogen, alkyl, alkoxy, aryl, alkaryl, aralkyl, hydroxyl, combines with a R3 connected to a same carbon atom to form a cyclic alkyl, combines with a R3 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings, or combines with R3 and the carbon atom to which both R2 and R3 are connected to form a carbonyl group; each R3 is independently hydrogen, alkyl, alkoxy, aryl, alkaryl, aralkyl, hydroxyl, combines with a R2 connected to a same carbon atom to form a cyclic alkyl, combines with a R2 connected to the same carbon atom to form a cyclic alkyl that is fused to one or more carbocyclic rings, combines with R2 and the carbon to which both R2 and R3 are connected to form a carbonyl group, or combines with R4 connected to adjacent carbon atom to form a carbon-carbon bond; and each R4 is independently hydrogen or combines with R3 connected to an adjacent carbon atom to form a carbon-carbon bond; and ii) a second monomer that is styrene, styrene substituted with one or more alkyl groups, alkyl (meth)acrylate, or a combination thereof, b) a free radical initiator.