Modification method and reinforcing effect of waste tire pyrolytic carbon black on natural rubber

• Published in: He cheng xiang jiao gong ye Vol. 46; no. 3; pp. 248 - 254
• Main Author: FANG Hai-bin, LI Ting-song， ZHOU Ping， CAI Xiao-hui， XIN Zhen-xiang
• Format: Journal Article
• Language: Chinese
• Published: Editorial Office of China Synthetic Rubber Industry 01.05.2023
• Subjects: ball milling modification; dry modification; dynamic mechanical property; mechanical property; modified resin; payne effect; pyroly-tic carbon black; waste tire
• ISSN: 1000-1255
• DOI: 10.19908/j.cnki.ISSN1000-1255.2023.03.0248

A planetary ball mill was used to treat the pyrolytic carbon black (CBp) of waste tire by dry modification with 3 types of modified resins, PA, PF-203 and Polstal-PC as the modifiers, the changes of physico-chemical properties and structure of CBp before and after modification were explored, and the effects of modified CBp on curing characteristics, cross-linking density, mechanical properties and dynamic mechanical properties of natural rubber were investigated. The results showed that the particle size of CBp decreased with the extension of milling time. The mo-dified resin Polstal-PC had the most obvious grinding effect, and compared with unmodified CBp, the total specific surface area of CBp modified by Polstal-PC increased from 65.1 m2/g to 97.4 m2/g and the specific surface area of the outer surface increased from 63.0 m2/g to 71.6 m2/g. All of the 3 type of modifiers contributed to vulcanization of natural rubber, and CBp modified by Polstal-PC could significantly improve tensile strength, modulus at 3