Method for the manufacture of an article with memory format, composition of polymer with format memory and method of campsite formation

摘要

b "method for the manufacture of an article with shape memory.The composition of polu00ecmero with shape memory and its training method of composition " d describes the compositions with shape memory polymer articles produced from them.Its preparation method and uses. The polymeric compositions with shape memory can retain more of a format in the memory.Suitable compositions include at least one hard segment and at least one soft segment. The T ~ trans ~ segment hard is, preferably, between - 30 and 270u00b0c.At least one of the segments, hard or soft, it may contain a group linkable, and it is possible to connect the segments through the formation of a network or a network interpenetrante semi interpenetrante,Or by physical interactions of the blocks.Objects can be molded in a given shape at a temperature higher than the T ~ trans ~ segment hard and cooled at a temperature below the T ~ trans ~ of soft segment.If the object is subsequ00b3entemente molded in a second format.The object can recover their original shape by heating above the T ~ trans ~ segment soft and below the T ~ trans ~ of hard segment.The compositions can also include two soft segments which are linked via the functional groups which are cut in response to the application of light, electric field, magnetic field or ultrasound.The rupture of these groups has resulted in the recovery of the original format of the object.