Jerald Maria Antony G, Raja S, Aruna S T, Jarali Chetan S
Structural Technologies Division, CSIR-National Aerospace Laboratories, HAL-Airport Road, Kodihalli, Bangalore, 560017, India.
Surface Engineering Division, CSIR-National Aerospace Laboratories, HAL-Airport Road, Kodihalli, Bangalore, 560017, India.
J Mech Behav Biomed Mater. 2020 Oct;110:103951. doi: 10.1016/j.jmbbm.2020.103951. Epub 2020 Jul 3.
There is a great demand for the synthesis of acrylate based thermoset shape memory polymer (SMP) associated with one monomer and one crosslinker such as tert-butyl acrylate (t-BA) with poly (ethylene glycol) dimethacrylate (PEGDMA). The present work describes the synthesis of a new thermoset SMP wherein a second monomer such as diurethane dimethacrylate (DUDMA) has been added to the existing tBA + PEGDMA SMP matrix. The synthesized thermoset shape memory polymer exhibited a glass transition temperature (Tg) of 55 °C, higher Young's Modulus of 3.23 GPa, transmittance of 95% and 100% shape recovery. The SMP exhibited response to both thermal and chemical stimuli. The shape recovery rate of the SMP network is 20 s compared to 24 s observed for SMP based on tBA + PEGDMA. The obtained SMP is very transparent and possesses higher stiffness (8 MPa) and hence may be suitable for biomedical shape memory lens and orthopedic application.
对于由一种单体和一种交联剂合成的丙烯酸酯基热固性形状记忆聚合物（SMP），比如丙烯酸叔丁酯（t-BA）与聚乙二醇二甲基丙烯酸酯（PEGDMA），有着巨大的需求。目前的工作描述了一种新型热固性SMP的合成，其中已向现有的tBA + PEGDMA SMP基体中添加了第二种单体，如二聚氨酯二甲基丙烯酸酯（DUDMA）。合成的热固性形状记忆聚合物表现出55℃的玻璃化转变温度（Tg）、3.23 GPa的较高杨氏模量、95%的透光率以及100%的形状恢复率。该SMP对热刺激和化学刺激均有响应。与基于tBA + PEGDMA的SMP所观察到的24秒相比，该SMP网络的形状恢复速率为20秒。所获得的SMP非常透明且具有较高的刚度（8 MPa），因此可能适用于生物医学形状记忆镜片和骨科应用。
