Abstract The present study addresses the mechanical behavior of polypropylene self-reinforced composites (SRC’s) considering polymeric structural changes after cutting. Self-reinforced polypropylene composite is fabricated using the HOT compaction method by maintaining the processing temperature at 164∘C. Conventional and unconventional cutting methods were used to cut the samples of standard dimensions. FTIR images revealed the formation of C=C, C-F, Halogen bonds after AWJ cutting initiated a decrease in the surface roughness value to 4.5μm (Ra). SEM analysis is performed to analyse structural integrity and damage of SRC’s. Structural changes formation after AWJ cutting leads to improve the ultimate tensile strength of the laminate by 20% compared to conventional cut samples. A similar trend is noticed for flexural properties and Shore –D hardness values for the SRC composite laminate correlated to polymeric changes with Conventional cutting due to the formation of C-N bond is observed after Laser cutting.

中文翻译：

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聚丙烯基自增强复合材料常规和非常规加工的结构变化和力学性能评价的比较研究

摘要 本研究探讨了考虑切割后聚合物结构变化的聚丙烯自增强复合材料 (SRC) 的机械性能。通过将加工温度保持在 164∘C，使用热压法制造自增强聚丙烯复合材料。常规和非常规切割方法用于切割标准尺寸的样品。FTIR 图像显示，在 AWJ 切割使表面粗糙度值降低至 4.5μm (Ra) 后，形成了 C=C、CF、卤素键。执行 SEM 分析以分析 SRC 的结构完整性和损坏。与传统切割样品相比，AWJ 切割后形成的结构变化导致层压板的极限拉伸强度提高了 20%。