Improvement of the properties of natural rubber/ground tire rubber composites through biological desulfurization of GTR

被引：40
作者：
Li, Yuanhu [1 ]
Zhao, Suhe [1 ]
Wang, Yaqin [2 ]
机构：
[1] Beijing Univ Chem Technol, Key Lab Beijing City Preparat & Proc Novel Polyme, Coll Mat Sci & Engn, Beijing 100029, Peoples R China
[2] Beijing Univ Chem Technol, Coll Life Sci & Technol, Beijing 100029, Peoples R China
来源：
JOURNAL OF POLYMER RESEARCH | 2012年 / 19卷 / 05期
基金：
国家高技术研究发展计划(863计划);
关键词：
Ground tire rubber; Desulfurization; Natural rubber; Composites; Mechanical properties; RECLAIMED RUBBER/NATURAL RUBBER; GROUND RUBBER; WASTE; DEVULCANIZATION; RECLAMATION; DISULFIDE; BEHAVIOR; SULFIDE;
D O I：
10.1007/s10965-012-9864-y
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The surface desulfurization of ground tire rubber (GTR) had been carried out via a biological treatment by Thiobacillus sp. with strong sulfur oxidizing capacity. The bonding states and element content on the surface of GTR and desulfurated GTR (DGTR) were evaluated using an X-ray Photoelectron Spectroscopy (XPS). The contact angle of GTR was 120.5 degrees and decreased down to 93.5 degrees after treatment. The cure characteristics, swelling behavior, and crosslink density of natural rubber (NR)/GTR and NR/DGTR were examined. The improvement in mechanical properties was observed for NR/DGTR vulcanizates, which was attributed to the enhanced interfacial interaction between DGTR and NR matrix. The dynamic mechanical analysis (DMA) results showed that NR/DGTR vulcanizates had a reduction of molecular chain friction resistance during glass transition region and Scanning electron microscopy (SEM) studies further indicated a good coherency and homogeneity between DGTR and NR matrix.
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页数：7
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