| abstract |
Disclosed are oriented films comprising toughened poly(hydroxy-alkanoic acid) resin compositions comprising poly(hydroxyalkanoic acid) and an impact modifier comprising an ethylene copolymer made from monomers (a) ethylene; (b) one or more olefins of the formula CH 2 ═C(R 3 )CO 2 R 4 , where R 3 is hydrogen or an alkyl group with 1-6 carbon atoms, such as methyl, and R 4 is glycidyl; and optionally (c) one or more olefins of the formula CH 2 ═C(R 1 )CO 2 R 2 , where R 1 is hydrogen or an alkyl group with 2-8 carbon atoms and R 2 is an alkyl group with 1-8 carbon atoms, such as methyl, ethyl, or butyl. The ethylene copolymer may further be made from carbon monoxide monomers. The compositions may further comprise one or more ethylene/acrylate and/or ethylene/vinyl ester polymers, ionomers, and cationic grafting agents. Also disclosed are packaging materials and containers comprising the oriented films. |