| 摘要 |
PROBLEM TO BE SOLVED: To provide a shape memory molded product having excellent shape recovery force in two stages. SOLUTION: A shape memory resin has a region which is crosslinked by covalently-bonding thermally-reversible reaction of forming a covalent bond by cooling and a cleavage by heating, and further has a region which is crosslinked by covalently-bonding irreversible reaction, wherein a glass transition temperature (Tg) or a crystal-melting temperature (Tm) of the resin exists in a range of not less than 40°C and not more than 200°C, a cleavage temperature (Td) of the thermally-reversible reaction exists in a range of not less than 50°C and not more than 300°C and satisfying: Tg(or Tm)+10°C≤Td, memory of a first shape which is brought about by irreversible crosslinking and memory of a second shape which is brought about by thermally-reversible crosslinking are each made to be possible, and shape memory in the two stages which is brought about by being combined with a third shape using characteristics of Tg (or Tm) is made to be possible. COPYRIGHT: (C)2007,JPO&INPIT
|
