Figure 4 illustrates the XRD pattern of pure PVA film. One can notice that pure PVA film exhibits two characteristic peaks at 19.5 • and 38.6 • which are related to the semi-crystalline...

2004年2月10日 · The structure of physical poly (vinyl alcohol) (PVA) hydrogels prepared by subjecting a PVA/D 2 O solution (11% w/w PVA) to freeze (−22 °C)/thaw (+25 °C) cycles has been systematically investigated by X-ray powder diffraction technique as a function of the number of cycles and aging time.

2011年11月6日 · 摘 要：首次引入x-射线衍射（xrd） 谱图数字分峰技术，对不同工艺条件下生产的聚乙烯醇（pva） 纤维微观结构进行研究。结果表明：pva 纤维具有较高的结晶度，xrd 谱图显示在2θ =5~45°范围内有

2021年8月1日 · Structural, morphological, spectroscopic, and mechanical studies are performed for pure PVA and heat-treated PVA films. XRD spectra show the evolution of some weak peaks due to heat treatment, and as a result, crystallinity modifies and increases for the specific condition of the heat treatment.

Figure 3 presents the XRD patterns for pure PVA and PVA–Au nanocomposite films with varying concentrations of Au nanoparticles. The diffraction pattern of pure PVA (curve ‘a’) indicates a...

Crystal structure of nanomaterial (CDs@MSN, NS/CDs@MSN and MSN) and PVA composite hydrogel was characterized using X-ray diffractometry (XRD) (Gupta et al., 2009) with 2-theta from 10 to 50 ...

2023年5月2日 · XRD results suggest a possible improvement in the crystallinity of the PVA/f-MWCNTs composite film compared to a pristine one. Also, FTIR and XPS results confirm the formation of a hydrogen bond between PVA chains and f-MWCNTs.

2 天之前 · In the XRD pattern of PVA-AV fibers, the most prominent peaks were observed at 2θ values of 19.61°, 21.26°, and 37.80°, indicating the presence of a semi-crystalline structure. In contrast, the XRD pattern of PLA-PR fibers exhibited a single strong crystalline peak at 2θ = 37.82°, suggesting a more defined crystalline phase.

2020年3月15日 · The XRD spectra of the PVA/PEG blends show characteristic peak at 2θ of around 20˚. This peak is related to the partially crystalline structure of the PVA phase. The intensity of this peak decreases as the PEG content increases in VxE1 series of samples.

2023年9月15日 · The X-ray diffraction (XRD) profiles indicate the presence of CuO nanoparticles (NPs) in PVA film. XRD results indicate that, the CuO NPs were successfully incorporated into the PVA host matrix with no additional impurity peaks.