Klapiszewski Łukasz, Tomaszewska Jolanta, Skórczewska Katarzyna, Jesionowski Teofil
Institute of Chemical Technology and Engineering, Faculty of Chemical Technology, Poznan University of Technology, Berdychowo 4, PL-60965 Poznan, Poland.
Faculty of Chemical Technology and Engineering, UTP University of Science and Technology in Bydgoszcz, Seminaryjna 3, PL-85326 Bydgoszcz, Poland.
Polymers (Basel). 2017 Jun 30;9(7):258. doi: 10.3390/polym9070258.
A functional magnesium hydroxide/lignin hybrid system was prepared by grinding and mixing the pure precursors using a planetary ball mill. In addition, the thermal stability was assessed based on the total mass loss of the hybrid system within the temperature range of 30⁻1000 °C, which amounted to 38%. Moreover, the average particle size was at 4.9 μm as determined by the laser diffraction method. The effect of addition of the prepared and characterized Mg(OH)₂/lignin hybrid filler at concentrations ranging from 2.5 wt % to 10 wt % on the processing as well as mechanical and thermal properties of composites on the matrix of the unplasticized PVC compound was also evaluated. The addition of a filler to the poly(vinyl chloride) matrix causes a significant improvement of its thermal stability, which is approximately three times higher compared to a polymer without a filler. Furthermore, the prepared composites are additionally characterized by advantageous mechanical properties, especially higher Young's modulus. A 10% increase in the oxygen index of PVC composites upon addition of 10 wt % hybrid fillers has also been observed, which contributes to an extended range of their application under conditions that require notable fire resistance.
通过使用行星式球磨机研磨和混合纯前驱体，制备了一种功能性氢氧化镁/木质素混合体系。此外，基于混合体系在30⁻1000℃温度范围内的总质量损失对其热稳定性进行了评估，该总质量损失达38%。而且，通过激光衍射法测定，平均粒径为4.9μm。还评估了添加浓度为2.5 wt%至10 wt%的已制备并表征的Mg(OH)₂/木质素混合填料对未增塑PVC复合材料基体的加工性能以及机械和热性能的影响。向聚氯乙烯基体中添加填料会使其热稳定性显著提高，与无填料的聚合物相比大约高出三倍。此外，所制备的复合材料还具有有利的机械性能，尤其是更高的杨氏模量。还观察到添加10 wt%混合填料后PVC复合材料的氧指数提高了10%，这有助于在需要显著耐火性的条件下扩大其应用范围。
