The effect of dynamic vulcanization on the mechanical, dynamic mechanical and fatigue properties of TPV based on polypropylene and ground tire rubber

Abstract Thermoplastic elastomer blends consisting of 30% polypropylene and 70% ground rubber tire, pure or combined with virgin styrene-butadiene copolymer, were successfully prepared through a dynamic vulcanization process, involving dicumyl peroxide and N,N′-m-phenylene-bis-maleimide (BMI), in different proportions. The blends have shown excellent ultimate tensile strength and elongation at break, comparable with several others TPV systems, and also good reprocessing, which becomes useful for several potential applications. The blends were also characterized in terms of fatigue properties, morphology and dynamic mechanical properties. The tensile properties after fatigue stress decreased but this behavior was less significant for PP/GTR vulcanized blends. The effects of the dynamic vulcanization and the presence of GTR on the degree of crystallinity of the PP phase were also evaluated by differential scanning calorimetry analysis.

[1]  W. Brostow,et al.  Thermoplastic elastomers from rubber and recycled polyethylene: chemical reactions at interphases for property enhancement , 2004 .

[2]  Jin Kuk Kim,et al.  A comparative study of effect of compatibilization agent on untreated and ultrasonically treated waste ground rubber tire and polyolefin blends , 2006 .

[3]  A. Bhowmick,et al.  Effect of chlorination of ground rubber tire on its compatibility with poly(vinyl chloride): Dielectric studies , 2002 .

[4]  Jin Kuk Kim,et al.  Dynamic reaction inside co‐rotating twin screw extruder. I. Truck tire model material/polypropylene blends , 2007 .

[5]  S. Ryu,et al.  Mechanical and dynamic mechanical properties of waste rubber powder/HDPE composite , 2000 .

[6]  H. Ismail,et al.  Polypropylene-based blends containing waste tire dust: Effects of trans-polyoctylene rubber (TOR) and dynamic vulcanization , 2007 .

[7]  E. J. Amir,et al.  Thermoplastic elastomers: Part III—Ageing and mechanical properties of natural rubber-reclaimed rubber/polypropylene systems and their role as solid phase dispersants in polypropylene/polyethylene blends , 1989 .

[8]  B. Adhikari,et al.  Reclamation and recycling of waste rubber , 2000 .

[9]  H. Ismail,et al.  Thermoplastic elastomers based on polypropylene/natural rubber and polypropylene/recycle rubber blends , 2002 .

[10]  H. Akil,et al.  The Effect of HVA-2 Addition on the Properties of PP–EPDM–NR Ternary Blends , 2005 .

[11]  A. Bhowmick,et al.  Melt-processable rubber: Chlorinated waste tire rubber-filled polyvinyl chloride , 2002 .

[12]  H. L. Stephens,et al.  Handbook of elastomers : new developments and technology , 1988 .

[13]  T. Inoue.  Selective crosslinking in polymer blends. II. Its effect on impact strength and other mechanical properties of polypropylene/unsaturated elastomer blends , 1994 .

[14]  B. Dabir,et al.  RELATIONSHIP BETWEEN INTERFACIAL TENSION AND DISPERSED-PHASE PARTICLE SIZE IN POLYMER BLENDS. I. PP/EPDM , 2002 .

[15]  A. Bhowmick,et al.  Thermoplastic elastomeric composition based on ground rubber tire , 2001 .

[16]  R. Singh,et al.  Telechelic cis‐1,4‐oligoisoprenes through the selective oxidolysis of epoxidized monomer units and polyisoprenic monomer units in cis‐1,4‐polyisoprenes , 2003 .

[17]  Jin Kuk Kim,et al.  Dynamic reaction inside co‐rotating twin screw extruder. II. Waste ground rubber tire powder/polypropylene blends , 2007 .

[18]  F. Ciardelli,et al.  Monitoring the chemical crosslinking of propylene polymers through rheology , 2002 .

[19]  B. Kuriakose,et al.  Natural rubber–isotactic polypropylene thermoplastic blends , 2004 .

[20]  W. E. Baker,et al.  Ground rubber tire/thermoplastic composites : effect of different ground rubber tires , 1993 .

[21]  W. E. Baker,et al.  The Role of Functional Polymers in Ground Rubber Tire-Polyethylene Composite , 1992 .

[22]  A. Bhowmick,et al.  Thermoplastic elastomers from rubber-plastic blends , 1990 .

[23]  W. E. Baker,et al.  The use of cryogenically ground rubber tires as a filler in polyolefin blends , 1993 .

[24]  Azman Hassan,et al.  Mechanical and morphological properties of PP/NR/LLDPE ternary blend—effect of HVA-2 , 2003 .

[25]  H. Ismail,et al.  Preparation and characterization of polypropylene/waste tyre dust blends with addition of DCP and HVA-2 (PP/WTDP-HVA2) , 2008 .

[26]  J. Karger‐Kocsis,et al.  Thermoplastic Elastomers Based on Recycled High-Density Polyethylene, Ethylene-Propylene-Diene Monomer Rubber, and Ground Tire Rubber , 2005 .

[27]  S. Tantayanon,et al.  Enhanced toughening of poly(propylene) with reclaimed‐tire rubber , 2004 .

[28]  P. Phinyocheep,et al.  Influence of compatibilizers on mechanical properties, crystallization, and morphology of polypropylene/scrap rubber dust blends , 2002 .

[29]  Giljong Oh,et al.  Dynamic reaction involving surface modified waste ground rubber tire powder/polypropylene , 2009 .

[30]  Yong Zhang,et al.  Structure and mechanical properties of SRP/HDPE/POE (EPR or EPDM) composites , 2003 .

[31]  B. Dutta,et al.  Thermoplastic elastomers from reclaimed rubber and waste plastics , 2002 .

[32]  R. C. Michel,et al.  A methodology for studying the dependence of electrical resistivity with pressure in conducting composites , 2005 .

[33]  A. Bhowmick,et al.  Thermoplastic elastomeric composition based on maleic anhydride–grafted ground rubber tire , 2002 .

[34]  K. Naskar,et al.  Dynamically vulcanized blends of polypropylene and ethylene octene copolymer: Influence of various coagents on mechanical and morphological characteristics , 2009 .

[35]  K. Kar,et al.  Hysteresis measurements and dynamic mechanical characterization of functionally graded natural rubber–carbon black composites , 2010 .

[36]  T. Inoue,et al.  Selective crosslinking reaction in polymer blends. III. The effects of the crosslinking of dispersed EPDM particles on the impact behavior of PP/EPDM blends , 1995 .

[37]  B. G. Soares,et al.  Dynamically vulcanized polypropylene/nitrile rubber blends: The effect of peroxide/bis‐maleimide curing system and different compatibilizing systems , 2008 .

[38]  J. Karger‐Kocsis,et al.  LDPE-based thermoplastic elastomers containing ground tire rubber with and without dynamic curing , 2002 .