Adjustable volume and loading release of shape memory polymer microcapsules

Zhang, Fenghua; Wang, Lu; Geng, Qiangwang; Liu, Yanju; Leng, Jinsong; Smoukov, Stoyan K.

doi:10.1080/19475411.2023.2166143

Cited by 6 publications

(1 citation statement)

References 51 publications

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“…Shape memory polymers (SMPs) are a class of intelligent materials that can be triggered by external environmental conditions, such as temperature, moisture, solution, light, electric or magnetic fields, etc [1][2][3][4][5]. Over the last 40 years, this type of material has received a lot of attention in many fields due to its excellent mechanical properties [6][7][8][9]. Compared with * Authors to whom any correspondence should be addressed.…”

Section: Introductionmentioning

confidence: 99%

A thermo-mechanical constitutive model for triple-shape and two-way shape memory polymers

Gu,

Wang,

Zeng

et al. 2024

Smart Mater. Struct.

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Semicrystalline polymers often have diverse molecular configurations in response to the variation of temperature, making it easier to realize multiple or two-way shape memory effects (SMEs). In order to provide guidance for the design of relevant smart structures, it is necessary to develop corresponding constitutive models to better characterize the thermal-mechanical behavior of such shape memory polymers (SMPs). For the first time, a thermo-mechanical finite deformation constitutive model is presented to reveal the deformation mechanism of the triple-shape two-way SME of semicrystalline SMPs in our work, based on the theory of thermodynamics with internal state variables. To verify the validity of the model, the model results are compared with the test data for a typical shape memory cycle. It is found that the model can be employed to describe the non-equilibrium response of semicrystalline SMPs with two types of crystallites in the vicinity of crystallization and melting. Since the model results fit well with the test data, the effectiveness of the model in predicting the triple two-way shape memory behavior is demonstrated.

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