Investigation of abiotic degradation of tire cryogrinds
Investigation of abiotic degradation of tire cryogrinds
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轮胎低温研磨剂非生物降解的研究
DOI：
10.1016/j.polymdegradstab.2021.109814
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发表时间：
2022
影响因子：
5.9
通讯作者：
Soucek, Mark D.
中科院分区：
文献类型：
--
作者：
Thomas, Jomin;Moosavian, Seyed Kasra;Cutright, Teresa;Pugh, Coleen;Soucek, Mark D.
在环境中发现的大量微塑料是一个令人担忧的主要原因。轮胎胎面颗粒含有硫化促进剂和抗氧化剂等添加剂，可能是环境中弹性体污染的主要来源。这种轮胎颗粒与路面颗粒结合在一起称为轮胎和路面磨损颗粒，简称TRWP。通过冻融、湿干和加速紫外光老化试验，评价了母体弹性体的环境可用性和非生物降解过程中添加剂的释放。进行加速系数测定试验，以将紫外线照射与环境中的自然老化联系起来。冻融试验表明，二苯基胍(DPG)、苯并噻唑亚磺酰胺(BTS)和对苯二胺(6 PPD)等添加剂是四氢呋喃渗滤液和BTS转化产物。此外，紫外线暴露相当于1.5年，3年。和5岁。老化导致丁苯橡胶(SBR)、天然橡胶(NR)和丁二烯橡胶基胎用冷冻剂中酮和羧酸的形成。用衰减全反射傅里叶变换红外光谱(ATR-FTIR)检测弹性体在紫外光照射下的降解情况，用气相色谱-质谱仪(GC-MS)作为一种非靶向、可疑的筛选分析技术。利用GC-MS鉴定的降解中间体和渗滤液为功能聚合物和添加剂的生命周期分析及其环境释放的可能性提供了有用的数据。
The abundance of microplastics found in the environment is a major cause of concern. Tire tread particles containing additives such as curing accelerators and antioxidants, can be a major source of elastomer pollution in the environment. Such tire particles combined with road pavement particles are referred to as tire and road wear particles, TRWP. The environmental availability from parent elastomers and the release of additives in the process of abiotic degradation were evaluated using freeze-thaw, wet-dry and accelerated UV-weathering experiments. Acceleration factor determination tests were conducted to correlate UV-exposure to the natural aging in the environment. Freeze-thaw testing showed many additives such as diphenyl guanidine (DPG), benzothiazole sulfenamide (BTS) and para-phenylene diamine (6 PPD) as tetrahydrofuran leachates and BTS transformation products. Further, UV exposure equivalent to 1.5 yr., 3 yr. and 5 yr. aging resulted in the formation a combination of ketones and carboxylic acids for styrene butadiene rubber (SBR), natural rubber (NR), and butadiene rubber-based tire cryogrinds. Attenuated total reflectance- Fourier- transform infrared spectroscopy (ATR-FTIR) was used to detect the degradation of the elastomers on UV-exposure while gas chromatography-mass spectroscopy (GC-MS) was used as a nontargeted, suspect screening analysis technique. The degradation intermediates and leachates identified using GC-MS represents useful data for the life cycle analysis of the functional polymers and additives and their possibility of environmental release.