Abstract: Polymer blends are described that are formed from a transient polymer material, a polymer comprising an acrylonitrile group (e.g., ABS, SAN), and/or one or more polyester polymers. For blends in which two or more polyester polymers are blended with a transient polymer material, at least two of the polyester polymers are immiscible with one another, and one of the polyester polymers has a glass transition temperature less than or equal to 0° C. The polymer blends herein can decompose into liquid phase decomposition products upon exposure to a transience reaction trigger in less than 8 hours even at temperatures of less than ?20° C.

Abstract: An enhanced automatic activation device (EAAD) is provided. The EAAD includes a housing; a plurality of environmental sensors disposed within the housing; a connection to a reserve canopy deployment mechanism, the connection being disposed at least partially within the housing; and a processor coupled to the plurality of environmental sensors and the connection. The processor is configured to execute a machine learning process. The machine learning process is configured to classify environmental data from the plurality of environmental sensors into either a first group associated with nominal deployment of a main canopy of a parachute rig or a second group associated with failed deployment of the main canopy of the parachute rig. The processor is also configured to transmit a signal to the reserve canopy deployment mechanism where the machine learning process classifies the environmental data within the second group.

Abstract: Polymer blends are described that are formed from a transient polymer material, a polymer comprising an acrylonitrile group (e.g., ABS, SAN), and/or one or more polyester polymers. For blends in which two or more polyester polymers are blended with a transient polymer material, at least two of the polyester polymers are immiscible with one another, and one of the polyester polymers has a glass transition temperature less than or equal to 0° C. The polymer blends herein can decompose into liquid phase decomposition products upon exposure to a transience reaction trigger in less than 8 hours even at temperatures of less than ?20° C.