Influence of ground tire rubber devulcanization conditions on properties of its thermoplastic vulcanizate blends with copolyester

被引:41
作者
Sripornsawat, Boripat [1 ]
Saiwari, Sitisaiyidah [1 ]
Pichaiyut, Skulrat [2 ]
Nakason, Charoen [2 ]
机构
[1] Prince Songkla Univ, Fac Sci & Technol, Dept Rubber Technol & Polymer Sci, Pattani Campus, Pattani 94000, Thailand
[2] Prince Songkla Univ, Fac Sci & Ind Technol, Surat Thani Campus, Surat Thani 84000, Thailand
关键词
Devulcanized rubber; Copolyester; Thermoplastic vulcanizates; Devulcanization; Thermo-chemical method; MECHANICAL-PROPERTIES; POLY(VINYL CHLORIDE); WASTE; GTR; NR; POLYPROPYLENE; RECLAMATION; DEGRADATION; COMPOSITES; MORPHOLOGY;
D O I
10.1016/j.eurpolymj.2016.10.031
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Devulcanized rubber (DR) was prepared from used truck tires via thermo-chemical devulcanization. Effects of devulcanizing reaction time and temperature were studied, and the DR contained higher sol fraction but had lower crosslink density than un-devulcanized rubber (UDR). Furthermore, the soluble fraction (sol fraction) increased with devulcanizing time and temperature. Devulcanizing for 4 min at 180 degrees C was chosen as the most efficient alternative. Then, thermoplastic vulcanizates (TPVs) from blends of copolyester (COPE) with two alternative types of recycled rubber (i.e., DR and UDR) were prepared and their mechanical, morphological, rheological, thermal and swelling properties were investigated. It was found that the dynamically cured DR/COPE blends exhibited higher mechanical and thermal resistance than the dynamically cured UDR/COPE blends. Furthermore, the complex viscosity and storage modulus of the dynamically cured DR/COPE blends decreased with devulcanizing time, due to breakdown of the rubber network and the carbon main chains in rubber molecules. In addition, phase separated micron-sized vulcanized rubber domains were finely dispersed in the COPE matrix, and their size correlated well with the mechanical strength and other related properties. However, the rubber domains agglomerated with excessive devulcanization, causing inferior mechanical strength. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码:279 / 297
页数:19
相关论文
共 57 条
  • [1] Partial Replacement of NR by GTR in Thermoplastic Elastomer Based on LLDPE/NR Through Using Reactive Blending: Its Effects on Morphology, Rheological, and Mechanical Properties
    Abadchi, Majid Rezaei
    Arani, Azam Jalali
    Nazockdast, Hossien
    [J]. JOURNAL OF APPLIED POLYMER SCIENCE, 2010, 115 (04) : 2416 - 2422
  • [2] Reclamation and recycling of waste rubber
    Adhikari, B
    De, D
    Maiti, S
    [J]. PROGRESS IN POLYMER SCIENCE, 2000, 25 (07) : 909 - 948
  • [3] Mechanochemical surface activation of ground tire rubber by solid-state devulcanization and grafting
    Cavalieri, F
    Padella, F
    Cataldo, F
    [J]. JOURNAL OF APPLIED POLYMER SCIENCE, 2003, 90 (06) : 1631 - 1638
  • [4] Composites reinforced with reused tyres:: Surface oxidant treatment to improve the interfacial compatibility
    Colom, X.
    Carrillo, F.
    Canavate, J.
    [J]. COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING, 2007, 38 (01) : 44 - 50
  • [5] RUBBER-THERMOPLASTIC COMPOSITIONS .1. EPDM-POLYPROPYLENE THERMOPLASTIC VULCANIZATES
    CORAN, AY
    PATEL, R
    [J]. RUBBER CHEMISTRY AND TECHNOLOGY, 1980, 53 (01): : 141 - 150
  • [6] Analysis of thermal properties and impact strength of PP/SRT, PP/EPDM and PP/SRT/EPDM mixtures in single screw extruder
    da Costa, Helson M.
    Ramos, Valeria D.
    Rocha, Marisa C. G.
    [J]. POLYMER TESTING, 2006, 25 (04) : 498 - 503
  • [7] Reclaiming of ground rubber tire (GRT) by a novel reclaiming agent
    De, D
    Das, A
    De, D
    Dey, B
    Debnath, SC
    Roy, BC
    [J]. EUROPEAN POLYMER JOURNAL, 2006, 42 (04) : 917 - 927
  • [8] Effect of ultrafine, fully vulcanized acrylate powdered rubber on the mechanical properties and crystallization behavior of nylon 6
    Ding, XJ
    Xu, RW
    Yu, DS
    Chen, H
    Fan, R
    [J]. JOURNAL OF APPLIED POLYMER SCIENCE, 2003, 90 (13) : 3503 - 3511
  • [9] Dubinin S, 2008, CHEM LISTY, V102, P166
  • [10] The status of recycling of waste rubber
    Fang, Y
    Zhan, MS
    Wang, Y
    [J]. MATERIALS & DESIGN, 2001, 22 (02): : 123 - 127