▎ 摘　　要

NOVELTY - Bidirectional shape memory polymer composite material without external force, comprises ethylene propylene diene monomer (EPDM) rubber, polyolefin plastic and methacrylate. The ethylene propylene diene monomer rubber is a continuous matrix, the polyolefin plastic is used as a dispersed phase, and the methacrylate is grafted on the molecular chain of ethylene propylene diene monomer rubber. USE - Used as bidirectional shape memory polymer composite material without external force. ADVANTAGE - The material has an ultra-wide melting temperature range. The method is simple, which is beneficial to realize large-scale preparation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing bidirectional shape memory polymer composite material without external force, comprising mixing EPDM rubber, polyolefin plastic, methacrylate and functional filler, and cross-linking to obtain the bidirectional shape memory polymer composite without external force.