使用聚丙烯回收材料通过超声微注塑成型工艺制造的零件的力学性能研究。

Investigation of the Mechanical Properties of Parts Fabricated with Ultrasonic Micro Injection Molding Process Using Polypropylene Recycled Material.

作者信息

Gaxiola-Cockburn Rafael, Martínez-Romero Oscar, Elías-Zúñiga Alex, Olvera-Trejo Daniel, Reséndiz-Hernández José Emiliano, Soria-Hernández Cintya G

机构信息

Mechanical Engineering and Advanced Materials Department, School of Engineering and Science, Tecnologico de Monterrey, Ave. Eugenio Garza Sada 2501, Monterrey 64849, Mexico.

出版信息

Polymers (Basel). 2020 Sep 7;12(9):2033. doi: 10.3390/polym12092033.

DOI:10.3390/polym12092033

PMID:32906722

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7569819/

Abstract

This research focuses on investigating how physical and mechanical properties of polypropylene (PP) recycled material are modified when ultrasonic micro injection molding (UMIM) technology is used to produce material specimens. Experimental characterization by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), Fourier transform infrared (FTIR) spectra, and rheology tests show that the fabricated PP samples were able to withstand up to five times recycled processing before some signs of mechanical and physical properties degradation are observed. Surprisingly, uniaxial extension tests show an increase of 3.07%, 10.97% and 27.33% for Young's modulus, yield stress and ultimate stress values, respectively, and a slight reduction of 1.29% for the samples elongation at break when compared to the experimental data collected from virgin material samples. The improvement of these mechanical properties in the recycled samples suggests that ultrasonic microinjection produces a mechano-chemical material change.

摘要

本研究聚焦于调查当使用超声微注塑成型（UMIM）技术生产材料样本时，聚丙烯（PP）回收材料的物理和机械性能是如何被改变的。通过差示扫描量热法（DSC）、热重分析（TGA）、傅里叶变换红外（FTIR）光谱以及流变学测试进行的实验表征表明，所制造的PP样本在观察到一些机械和物理性能降解迹象之前，能够承受高达五次的回收加工。令人惊讶的是，与从原始材料样本收集的实验数据相比，单轴拉伸试验表明，杨氏模量、屈服应力和极限应力值分别增加了3.07%、10.97%和27.33%，而样本的断裂伸长率略有下降，为1.29%。回收样本中这些机械性能的改善表明，超声微注塑产生了机械化学材料变化。