废轮胎胎面胶粉/聚丙烯酸丁酯吸油膨胀材料预聚体的制备及性能研究

Preparation and Properties Research on WTR/PBA Oil-Absorbing Pre-Polymer

王思亮 王源升 任小孟 何 特 邓钦沂 臧真娟

WANG Si-liang WANG Yuan-sheng REN Xiao-meng HE Te DENG Qin-yi ZANG Zhen-juan

废轮胎胎面胶粉（WTR）加入到一定量的丙烯酸丁酯（nBA）中，再加入适量BPO，常温下搅拌后静置一段时间可得均一的黑色凝胶，该凝胶可作为预聚体进一步反应成型，得到WTR/PBA吸油膨胀材料。通过傅里叶红外光谱（FT-IR）测试，证明该凝胶的生成是因为在有WTR存在的情况下，BPO可在常温下引发nBA反应，生成丙烯酸丁酯均聚物，还有部分丙烯酸丁酯接枝于WTR上，单体转化率在10%~20%之间。流变性能测试证明该凝胶属于宾汉流体。预聚体加入交联剂DVB后进一步反应得到的混合材料饱和吸油量随交联剂用量的增大先增大后减小，在交联剂用量为1%时达到最大，吸汽油量为6.2 g/g，在60 min左右达到吸油平衡。动态机械分析（DMA）和扫描电镜（SEM）观察证明该体系具有很好的相容性。

A smooth black gel as pre-polymer was prepared at room temperature by mixing Waste tire rubber (WTR), butyl acrylate (nBA), and an appropriate amount of BPO. And WTR/PBA oil-absorbing materials could be formed under further reaction of the pre-polymer with cross-linker DVB. The structure and property of the pre-polymer were studied by FT-IR, and the saturated oil absorption of the oil-absorbing materials in gasoline was measured and the compatibility of WTR/PBA oil absorbing materials was investigated by dynamic mechanical analysis (DMA) and scanning electronic microscope (SEM). The results showed that the BPO could cause the reaction of nBA at room temperature in the existence of WTR, resulting in the formation of the gel. The oligomer of butyl acrylate was detected, as well as parts of butyl acrylate grafted onto WTR. The conversion of the monomer was between 10% and 20%. The test results of rheological properties of the pre-polymer showed that the gel belonged to a Bingham fluid. The saturated oil absorption of the WTR/PBA oil-absorbing materials increased first and then decreased with increasing the amount of crosslinking agent, the maximum amount of the absorped gasoline was 6.2 g/g at the dosage of 1% crosslinking agent, and the adsorption reaction reached balance after 60 min. The DMA and SEM measurements showed that the compatibility of the WTR/PBA oil-absorbing materials was excellent.