Low thermal stability and the shortage of core leakage strongly limit the application of conventional energy storage microcapsules. This study focuses on a novel strategy to develop a new phase change material with excellent thermal durability without core leakage. The new phase change materials is a P(BeA-co-MMA) copolymer microcapsule with crystalline n-alkane side chains. Under the protection of polymer main chains as the shell or skeleton structure on a nano-scale, the crystalline side chains as the core will no longer suffer loss and will maintain stablity in use. The chemical composition, inner homogeneous structure, thermoregulation properties, crystalline behaviour and thermal stability are discussed. The P(BeA-co-MMA) microcapsules provide energy storage capacity in the temperature range of 48–62 °C with the highest enthalpy of 105.1 J g⁻¹. The 5% weight loss temperature (T_5%) is more than 315 °C, which is high enough to withstand the general polymer processing temperature to open the possibility of developing energy storage modified fibre and polymer materials as functional fillers.

低的热稳定性和芯泄漏的缺乏强烈地限制了常规储能微胶囊的应用。这项研究集中于一种新颖的策略，以开发一种新型的相变材料，该材料具有出色的热耐久性而不会发生铁心泄漏。新型相变材料是具有结晶n的P（BeA-co-MMA）共聚物微胶囊。-烷烃侧链。在作为纳米级壳或骨架结构的聚合物主链的保护下，作为核的结晶侧链将不再遭受损失，并在使用中保持稳定性。讨论了化学成分，内部均匀结构，温度调节性能，晶体行为和热稳定性。P（BeA-co-MMA）微囊可在48-62°C的温度范围内提供储能能力，最高焓为105.1 J g ^-1。5％的失重温度（T _5％）高于315°C，该温度足以承受一般的聚合物加工温度，从而有可能开发出用作功能性填料的储能改性纤维和聚合物材料。