▎ 摘　　要

NOVELTY - Thermal deformation support arm, is claimed. The support arm is a bidirectional shape memory composite material prepared by blending or laminating a bidirectional shape memory polymer matrix phase and a matrix enhanced phase by physical method. USE - The thermal deformation support arm is useful for controlling space reflector unfolding state (clamed). ADVANTAGE - The method: can utilizes the two-way shape memory effect of the material through physical regulation and chemical regulation synergistic effect, and by sensing the change of the environmental temperature, and ensures that the material can automatically undergoes pre-programmed deformation, thus realize the unfolding of the space mirror when it is in the daytime area, when the area is closed at night, can reduces the damage caused by space debris to the space deployment structure, namely space mirrors, has long service life, and does not need to carry heating equipment, and is easy to carry. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the thermal deformation supporting arm, comprising (i) choosing the bidirectional shape memory polymer matrix phase, and determining the shape memory feature temperature of the bidirectional shape memory polymer matrix phase, (ii) blending or laminating the bidirectional shape memory polymer matrix phase and matrix enhanced phase by physical method to obtain the bidirectional shape memory composite material, (iii) manually making the bidirectional shape memory composite material obtained in the step (ii) to obtain a supporting arm structure, (iv) heating the supporting arm structure obtained in the step (iii) to the melting point of the bidirectional shape memory polymer matrix, obtaining the supporting arm shape needed by the space reflector in the non-photothermal environment by external force or mold fixing method, after the temporary shape is determined, rapidly cooling the temperature to the bidirectional shape memory polymer matrix phase crystallization temperature, allowing to stand until the shape is fixed, then removing external force or mold fixing, and (vi) adhering periphery of the supporting arm with flexible heat insulation material, the temperature of the supporting arm under the sun direct irradiation is not higher than the temperature T-high of the supporting arm returns to the maximum position of the reversible strain, the temperature of the supporting arm is not lower than the lowest temperature T-low where the supporting arm returns to the temporary shape under the state of no light heat radiation; and (2) use method of the thermal deformation support arm to control space reflector unfolding state, comprising (1) choosing the bidirectional shape memory polymer matrix phase, and determining the shape memory feature temperature of the bidirectional shape memory polymer matrix phase, (2) blending or laminating the bidirectional shape memory polymer matrix phase and matrix enhanced phase by physical method to obtain the bidirectional shape memory composite material, (3) manually making the bidirectional shape memory composite material obtained in the step (2) to obtain a supporting arm structure, (4) heating the supporting arm structure obtained in the step (3) to the melting point of the bidirectional shape memory polymer matrix, obtaining the supporting arm shape needed by the space reflector in the non-photothermal environment by external force or mold fixing method, after the temporary shape is determined, rapidly cooling the temperature to the bidirectional shape memory polymer matrix phase crystallization temperature, allowing to stand until the shape is fixed ,then removing external force or mold fixing, (5) adhering periphery of the supporting arm is with flexible heat insulation material, the temperature of the supporting arm under the sun direct irradiation is not higher than the temperature T-high of the supporting arm returns to the maximum position of the reversible strain, the temperature of the supporting arm in the state of no light heat radiation is not lower than the lowest temperature T-low of the supporting arm returns to the temporary shape, and (6) assembling the thermal deformation supporting arm obtained in step (5) with the space reflector thin film, the space reflector in the track operation process, because the solar light irradiation makes the temperature of the supporting arm is above the Tact and is lower than T-high, the molecular chain movement is exacerbated, the system entropy is increased, the stored energy is released to the driving domain crystal melting, the fixed part of the stress is released, the framework domain structure network remains unchanged, the molecular chain is still in the frozen state under the action of the cross-linked network, the thermal deformation supporting arm part is unfolded in use and unfolded state, the space reflector mirror surface performs reflection task, when the space reflector is in the state of deviating from the sunlight, because the environment temperature is reduced, the supporting arm basic material driving domain starts to orient crystal, the supporting arm is deformed according to the preset temporary shape, the thermal deformation supporting arm is in the state of recovering the folding state, and the space reflector mirror surface is folded.