in one aspect , the invention relates to a composition comprising a cellulose ester and a high boiling plasticizer having a boiling point greater than 370 ° c ., wherein the composition has a glass transition temperature greater than a similar composition having triphenyl phosphate plasticizer substituted for the high boiling plasticizer . the invention also related to articles and films made therefrom . this invention also relates to methods of making the compositions , articles and films .