Broda Jan, Fabia Janusz, Bączek Marcin, Ślusarczyk Czesław
Institute of Textile Engineering and Polymer Materials, University of Bielsko-Biala, Willowa 2, 43-309 Bielsko-Biala, Poland.
Polymers (Basel). 2020 Apr 14;12(4):910. doi: 10.3390/polym12040910.
An effective β-nucleating agent for polypropylene crystallization was obtained by the functionalization of reduced graphene oxide with calcium pimelate. The nucleating ability of the modified reduced graphene oxide (rGO-CP) was confirmed during non-isothermal crystallization. In further examinations, the rGO-CP was used as an additive to modify polypropylene fibers. The fibers were extruded in laboratory conditions. Gravity spun fibers containing three different concentrations of the rGO-CP and fibers taken at three different velocities were obtained. The supramolecular structure of the fibers was examined by means of calorimetric and X-Ray Scattering methods (DSC, WAXS, and SAXS). The considerable amount of -iPP was obtained only in the gravity spun fibers. In the fibers extruded at higher velocities, the diminishing impact of the additive on the fibers structure was revealed. The changes observed in the fiber structure in connection with the impact of the additive on polypropylene crystallization was discussed.
通过用庚二酸钙对还原氧化石墨烯进行功能化处理，获得了一种用于聚丙烯结晶的有效β成核剂。在非等温结晶过程中证实了改性还原氧化石墨烯（rGO-CP）的成核能力。在进一步的研究中，rGO-CP被用作添加剂来改性聚丙烯纤维。纤维在实验室条件下挤出。获得了含有三种不同浓度rGO-CP的重力纺丝纤维以及以三种不同速度获取的纤维。通过量热法和X射线散射方法（DSC、WAXS和SAXS）研究了纤维的超分子结构。仅在重力纺丝纤维中获得了大量的等规聚丙烯（iPP）。在较高速度下挤出的纤维中，揭示了添加剂对纤维结构的影响逐渐减小。讨论了与添加剂对聚丙烯结晶的影响相关的纤维结构变化。
