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首页> 外文期刊>Polymer Degradation and Stability >Influence of mechanical activation on the graft copolymerization of sugarcane bagasse and acrylic acid
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Influence of mechanical activation on the graft copolymerization of sugarcane bagasse and acrylic acid

机译：机械活化对甘蔗渣与丙烯酸接枝共聚的影响

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摘要

Sugarcane bagasse (SCB) was mechanically activated by home-made high efficiency stirring mill. Graft copolymers (SCB-g-PAA) of SCB with different mechanical activation times (t_M) and acrylic acid (AA) have been synthesized by using ammonium persulfate/sodium sulflte redox pair as an initiator in aqueous solution. The effect of t_M on the graft co-polymerization was evaluated by grafting ratio (GR) and grafting efficiency (GE). In addition, scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and differential scanning calorimetry (DSC) were used to characterize the granular morphology, functional groups, crystal structure and thermal properties of the product. It was found that the mechanical activation could split fiber bundles and decrease significantly the crystallinity. SCB degraded after the mechanical activation (MA) and its thermal stability declined. Moreover, the graft copolymerization was enhanced obviously by MA processing. And GR and GE increased with the increase of activation time.
机译：甘蔗渣（SCB）由自制的高效搅拌机机械活化。使用过硫酸铵/硫化钠氧化还原对作为引发剂在水溶液中合成了具有不同机械活化时间（t_M）和丙烯酸（AA）的SCB的接枝共聚物（SCB-g-PAA）。通过接枝率（GR）和接枝效率（GE）评估t_M对接枝共聚的影响。此外，使用扫描电子显微镜（SEM），傅立叶变换红外光谱（FTIR），X射线衍射（XRD）和差示扫描量热法（DSC）表征了颗粒的形貌，官能团，晶体结构和热性质。产品。已发现机械活化可分裂纤维束并显着降低结晶度。机械活化（MA）后，SCB降解，并且其热稳定性下降。而且，通过MA处理，接枝共聚作用明显增强。 GR和GE随激活时间的增加而增加。

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