这项研究调查了用于汽车内饰应用的新型聚合物复合材料。复合材料使用回收的聚丙烯(PPr)基质和羧甲基纤维素(CMC)作为填料(PPr/CMC:100/0、95/5和90/10wt。%).通过挤出和注射成型加工材料。考虑到它们的预期应用,评估了复合材料对关键气候因素的抵抗力,即,温度,湿度,湿度和紫外线辐射。此外,进行结构分析和FTIR分析以评估潜在的异质性和热稳定性。FTIR测试后,通过检测-OH的特征CMC谱带证实了羧甲基纤维素在聚丙烯中的掺入,C=O,和C-O-C基团。结果表明,5%和10%CMC复合材料的结构异质性轻微。然而,在复合材料或PPr基质本身中均未观察到热变形。已根据介电特性随频率的变化评估了PPr/CMC复合材料在上述气候因素作用下的行为。CMC的强极化导致浸入水中480h后复合材料电导率急剧增加,表明复合材料结构的弱化。暴露于紫外线辐射后,即使在UV辐射的第一个循环(72小时)之后,也观察到电导率的急剧增加。根据我们研究中获得的实验结果,建议使用PPr+10%CMC复合材料来获得不同的室内装饰品(地毯,supports,等。).同时,使用这些材料还具有减轻车辆质量的优点,因为它们的密度比聚合物低。
This research investigates novel polymeric composite materials for automotive interior trim applications. The composites utilize recycled polypropylene (PPr) matrix and carboxymethylcellulose (CMC) as filler (PPr/CMC: 100/0, 95/5, and 90/10 wt.%). The materials were processed by extrusion and injection molding. Considering their intended application, the composites were evaluated for resistance to key climatic factors, i.e., temperature, humidity, and UV radiation. In addition, structural analyses and FTIR analyses were performed to assess potential heterogeneity and thermal stability. Following FTIR tests, the incorporation of carboxymethyl cellulose in polypropylene is confirmed by the detection of characteristic CMC bands for -OH, C=O, and C-O-C groups. The results indicate slight structural heterogeneity in the 5% and 10% CMC composites. However, no thermal distortions were observed in either the composites or the PPr matrix itself. The behavior of PPr/CMC composites under the action of the mentioned climatic factors has been assessed from the variation of dielectric characteristics with frequency. The strong polarization of CMC leads to a sharp increase in composites electrical conductivity after submersion in water for 480 h, suggesting weakening of the composite structure. After exposure to UV radiation, a sharp increase in conductivity is observed even after the first cycle (72 h) of UV radiation. Following the experimental results obtained in our study, it is recommended to use the PPr +10% CMC composite for obtaining different interior ornaments (carpets, supports, etc.). At the same time, the use of these materials also has the advantage of lightening the mass of the vehicle due to their lower density than polymers.