废胶粉接枝十八胺（ODA-WRP）的制备及其在SBS改性沥青中的掺入性能

Preparation of Octadecyl Amine Grafted over Waste Rubber Powder (ODA-WRP) and Properties of Its Incorporation in SBS-Modified Asphalt.

作者信息

Han Meizhao, Zeng Xiang, Muhammad Yaseen, Li Jing, Yang Jing, Yang Song, Wei Yunhao, Meng Fei

机构信息

School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.

Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, Guangxi University, Nanning 530004, China.

出版信息

Polymers (Basel). 2019 Apr 11;11(4):665. doi: 10.3390/polym11040665.

DOI:10.3390/polym11040665

PMID:30979010

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6524018/

Abstract

Through a covalent grafting reaction, octadecyl amine (ODA) was grafted on the surface of waste rubber powder (WRP) to obtain an ODA-WRP modifier, which was in turn compounded with a styrene-butadiene-styrene block copolymer (SBS) to prepare ODA-WRP/SBS-modified asphalt. The three major indicators (i.e., dynamic shear rheometer (DSR), multi-stress creep recovery (MSCR), and separation tests) showed that 1-ODA-WRP effectively improved the complex shear modulus (G*), elastic Modulus (G'), and loss modulus (G″) by 36.47%, 40.57%, and 34.77% (64 °C and 10 Hz), respectively, as compared to pristine SBS-modified asphalt. Fluorescence microscopy (FM) results concluded that the enhancement in mechanical properties was accredited to the better compatibility of various components in asphalt and establishment of network structure between ODA-WRP and SBS in ODA-WRP/SBS-modified asphalt. Fourier infrared spectroscopy (FT-IR) and scanning electron microscope (SEM) analyses confirmed the successful synthesis of ODA-WRP. This study could be of great help in synthesizing ODA-WRP asphalt modified with SBS for highways and construction applications.

摘要

通过共价接枝反应，将十八烷基胺（ODA）接枝到废橡胶粉（WRP）表面，得到ODA-WRP改性剂，然后将其与苯乙烯-丁二烯-苯乙烯嵌段共聚物（SBS）复合，制备ODA-WRP/SBS改性沥青。三大指标（即动态剪切流变仪（DSR）、多应力蠕变恢复（MSCR）和离析试验）表明，与原始SBS改性沥青相比，1-ODA-WRP在64℃和10Hz条件下分别有效提高了复数剪切模量（G*）、弹性模量（G'）和损耗模量（G″）36.47%、40.57%和34.77%。荧光显微镜（FM）结果表明，力学性能的提高归因于沥青中各组分更好的相容性以及ODA-WRP/SBS改性沥青中ODA-WRP与SBS之间网络结构的建立。傅里叶红外光谱（FT-IR）和扫描电子显微镜（SEM）分析证实了ODA-WRP的成功合成。该研究对合成用于公路和建筑应用的SBS改性ODA-WRP沥青有很大帮助。