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采用过氧化物硫化的聚乳酸/磨碎轮胎橡胶共混物

Poly (Lactic Acid)/Ground Tire Rubber Blends Using Peroxide Vulcanization.

作者信息

Candau Nicolas, Oguz Oguzhan, León Albiter Noel, Förster Gero, Maspoch Maria Lluïsa

机构信息

Centre Català del Plàstic (CCP), Polytechnic University of Catalunya, Barcelona Tech (EEBE-UPC), Av. D'Eduard Maristany 16, 08019 Barcelona, Spain.

Faculty of Engineering and Natural Sciences, Materials Science and Nano Engineering, Sabanci University, 34956 Istanbul, Turkey.

出版信息

Polymers (Basel). 2021 May 6;13(9):1496. doi: 10.3390/polym13091496.

DOI:10.3390/polym13091496
PMID:34066622
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8124148/
Abstract

Poly (Lactic Acid) (PLA)/Ground Tire Rubber (GTR) blends using Dicumyl peroxide (DCP) as a crosslinking agent were prepared with the following aims: propose a new route to recycle wastes rubber from the automotive industry and improve the toughness and impact strength of the inherently brittle bio-based PLA. The GTR were subjected to two types of grinding process (cryo- and dry ambient grinding). Swelling measurements revealed the grinding to be associated with a mechanical damage of the rubber chains, independently on the type of grinding or on the GTR size (from <400 µm to <63 µm). Moreover, the finest GTR contains the largest amount of reinforcing elements (carbon black, clay) that can be advantageously used in PLA/GTR blends. Indeed, the use of the finest cryo-grinded GTR in the presence of DCP showed the least decrease of the tensile strength (-30%); maintenance of the tensile modulus and the largest improvement of the strain at break (+80%), energy at break (+60%) and impact strength (+90%) as compared to the neat PLA. The results were attributed to the good dispersion of both fine GTR and clay particles into the PLA matrix. Moreover, a possible re-crosslinking of the GTR particles and/or co-crosslinking at PLA/GTR interface in presence of DCP is expected to contribute to such improved ductility and impact strength.

摘要

以过氧化二异丙苯（DCP）作为交联剂制备了聚乳酸（PLA）/磨碎轮胎橡胶（GTR）共混物，其目的如下：提出一种回收汽车工业废橡胶的新途径，并提高本质上脆性的生物基聚乳酸的韧性和冲击强度。对GTR进行了两种研磨工艺（低温研磨和常温干式研磨）。溶胀测量结果表明，无论研磨类型或GTR尺寸（从<400 µm至<63 µm）如何，研磨都会导致橡胶链发生机械损伤。此外，最细的GTR含有最多的增强元素（炭黑、粘土），这些元素可有利地用于PLA/GTR共混物中。事实上，在DCP存在的情况下使用最细的低温研磨GTR时，拉伸强度下降最少（-30%）；与纯PLA相比，拉伸模量保持不变，断裂应变（+80%）、断裂能（+60%）和冲击强度（+90%）提高幅度最大。这些结果归因于细GTR和粘土颗粒在PLA基体中的良好分散。此外，预计在DCP存在的情况下，GTR颗粒可能发生重新交联和/或在PLA/GTR界面处发生共交联，从而有助于提高延展性和冲击强度。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/c6b53ff700e4/polymers-13-01496-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/de1f80db79f7/polymers-13-01496-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/c1a9b2b5b7bd/polymers-13-01496-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/e25dc0fd3269/polymers-13-01496-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/c6b53ff700e4/polymers-13-01496-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/348e8606018b/polymers-13-01496-g0A1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/f1d691d07a30/polymers-13-01496-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/0218dbeebac1/polymers-13-01496-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/9506d88293f2/polymers-13-01496-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/c3844e8bb7d9/polymers-13-01496-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/ae679871d5da/polymers-13-01496-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/5760e231e87f/polymers-13-01496-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/de1f80db79f7/polymers-13-01496-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/c1a9b2b5b7bd/polymers-13-01496-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/e25dc0fd3269/polymers-13-01496-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/778f1404c81b/polymers-13-01496-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/ff2a50167f29/polymers-13-01496-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/8a1e/8124148/c6b53ff700e4/polymers-13-01496-g012.jpg

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高剪切热动力学混合器中的机械化学处理作为轮胎回收的一种替代方法
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