Polypropylene (PP) was modified with maleic anhydride (MAH) via heterogeneous solid‐state radical grafting performed in a fluidized polymerization reactor. The effect of PP morphology and different concentration of initiator (dibenzoyl peroxide, DBP) on the course of the reaction and grafting efficiency was evaluated with using infrared spectroscopy, scanning electron microscopy (SEM) and particle surface analysis (BET method). With respect to obtained results, the reaction course can be strongly affected by the reaction conditions and PP morphology. Unlike the reactive modification in melt, heterogeneous reaction exhibits lower extent of β‐scission albeit the reaction conversion is lower. Solid‐state grafting can be used as an alternative method for the surface modification of nonpolar surfaces with polar monomers under mild conditions.

中文翻译：

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马来酸酐固相接枝到聚丙烯上：聚丙烯形态对多相反应的影响

通过在流化聚合反应器中进行的异质固态自由基接枝，用马来酸酐（MAH）改性聚丙烯（PP）。使用红外光谱，扫描电子显微镜（SEM）和颗粒表面分析（BET法）评估了PP形态和不同浓度的引发剂（过氧化二苯甲酰，DBP）对反应过程和接枝效率的影响。关于获得的结果，反应过程可能受到反应条件和PP形态的强烈影响。与熔体中的反应改性不同，异质反应显示出较低的β程度断言，尽管反应转化率较低。固态接枝可用作在温和条​​件下用极性单体对非极性表面进行表面改性的替代方法。