Varga László József, Görbe Ákos, Bárány Tamás
Department of Polymer Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Műegyetem rkp. 3., H-1111 Budapest, Hungary.
MTA-BME Lendület Lightweight Polymer Composites Research Group, Műegyetem rkp. 3., H-1111 Budapest, Hungary.
ACS Omega. 2023 Jun 15;8(25):22827-22835. doi: 10.1021/acsomega.3c01772. eCollection 2023 Jun 27.
In this study, we used four amorphous poly-alpha-olefin (APAO) grades to improve the toughness of drawn polypropylene (PP) tapes. The samples containing different amounts of APAOs were drawn in a heat chamber of a tensile testing machine. The APAOs reduced the work of drawing and increased the melting enthalpy of the drawn specimens, as they facilitated the movement of the PP molecules. The APAO with the highest molecular weight and with a low level of crystallinity increased both the tensile strength and the strain-at-break of the specimens, so we also produced drawn tapes from that PP/APAO blend on a continuous-operation stretching line. The continuously drawn tapes also showed improved toughness.
在本研究中，我们使用了四种非晶态聚α-烯烃（APAO）牌号来提高拉伸聚丙烯（PP）带的韧性。含有不同量APAO的样品在拉伸试验机的加热室中进行拉伸。APAO降低了拉伸功，并增加了拉伸试样的熔融焓，因为它们促进了PP分子的运动。分子量最高且结晶度低的APAO提高了试样的拉伸强度和断裂伸长率，因此我们还在连续操作的拉伸生产线上由该PP/APAO共混物制备了拉伸带。连续拉伸带也显示出韧性提高。
