A novel cross-linked self-sustaining film was prepared by reaction of carboxyl-capped poly(ethylene glycol) (PEG) with epoxy resin, followed by incorporation of the prepared material (named modified epoxy, ME) into an epoxy matrix. Self-sustaining films were obtained with up to 60 wt% ME in the epoxy matrix. Fourier-transform infrared spectroscopy (FTIR) and ¹³C nuclear magnetic resonance (NMR) were used for chemical characterization of the samples. Differential scanning calorimetry (DSC) study exhibited maximum enthalpy for PCM film reaching up to 41 J g⁻¹. The X-ray diffraction (XRD) and polarized optical microscopy (POM) indicated lesser degree of crystallinity of PEG segments due to constriction by crosslinked epoxy resin. Dynamic mechanical analysis (DMA) results indicate that the blend of epoxy and ME is compatible up to 30 wt% ME and there is distinct phase separation beyond this composition.

中文翻译：

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具有聚热和减振双重特性的聚乙二醇（PEG）改性环氧相变聚合物

通过使羧基封端的聚（乙二醇）（PEG）与环氧树脂反应，然后将制备的材料（称为改性环氧树脂，ME）掺入环氧基质中，制备了一种新型的交联自持膜。获得了在环氧基质中具有高达60 wt％ME的自持膜。傅里叶变换红外光谱（FTIR）和¹³ C核磁共振（NMR）用于样品的化学表征。差示扫描量热法（DSC）研究显示PCM膜的最大焓达到41 J g ^-1。X射线衍射（XRD）和偏振光学显微镜（POM）表明由于交联环氧树脂的收缩，PEG链段的结晶度较低。动态机械分析（DMA）结果表明，环氧树脂和ME的混合物在ME含量高达30 wt％时是相容的，并且在该组成之外还存在明显的相分离。