Abstract
The molecular weight of a polymer is of prime importance and greatly influences the processing and mechanical properties of the polymer. Trans-1,4-poly(butadiene-co-isoprene) multi-block copolymer rubbers (TBIR) exhibit outstanding fatigue resistance, low heat build-up and good abrasion resistance, and are expected to be desirable candidate for high performance tire. Study on the influence of TBIR with different molecular weights on the structure and properties of TBIR and natural rubber (NR)/TBIR blends is essential to understand its contribution to the greatly improved dynamic properties of the rubber vulcanizates. TBIR with different molecular weights characterized by 1H-NMR, 13C-NMR, GPC, and DSC were highly trans-1,4-copolymers with similar chain sequence distribution and crystalline trans-1,4-polyisoprene (TPI) blocks. The green strength and modulus of TBIR increased with the increasing molecular weight. The NR/TBIR compounds filled with 40 phr carbon black were chemically cured by sulfur for the preparation of NR/TBIR vulcanizates. The compatibility between NR and TBIR, filler distribution, crosslinking bond and density, and properties of NR/TBIR vulcanizates were studied. The NR/TBIR vulcanizates showed increasing tensile strength, hardness, modulus, rebound, abrasion resistance, and flexural fatigue properties with increasing molecular weight of TBIR. Furthermore, they presented significant improvement in flexural fatigue resistance when compared with that of NR vulcanizate. The contribution mechanism of TBIR on the NR/TBIR blends was discussed. The TBIR with a wide range of molecular weight are ideal rubbers for high performance tires.
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References
Castellano, M.; Conzatti, L.; Costa, G.; Falqui, L.; Turturro, A.; Valenti, B.; Negroni, F. Surface modification of silica: 1. Thermodynamic aspects and effect on elastomer reinforcement. Polymer 2005, 46, 695–703.
Prasertsri, S.; Rattanasom, N. Fumed and precipitated silica reinforced natural rubber composites prepared from latex system: Mechanical and dynamic properties. Polym. Test. 2012, 31, 593–605.
Wang, Y. X.; Ma, J. H.; Zhang, L. Q.; Wu, Y. O. Revisiting the correlations between wet skid resistance and viscoelasticity of rubber composites via comparing carbon black and silica fillers. Polym. Test. 2011, 30, 557–562.
Ismail, H.; Suzaimah, S. Styrene butadiene rubber/epoxidized natural rubber blends: Dynamic properties, curing characteristhttpsics and swelling studies. Polym. Test. 2000, 19, 879–888.
Mathew, N. M.; De, S. K. Scanning electron microscopy studies in abrasion of NR/BR blends under different test conditions. J. Mater. Sci. 1983,18, 515–524.
Wu, W. L.; Chen, D. J. Silica–modified SBR/BR blends. J. Appl. Polym. Sci. 2015,120, 3695–3700.
Wang, Y. X.; Wu, Y. P.; Li, W. J.; Zhang, L. Q. Influence of filler type on wet skid resistance of SSBR/BR composites: Effects from roughness and micro–hardness of rubber surface. Appl. Surf Sci. 2011, 257, 2058–2065.
Rattanasom, N.; Saowapark, T.; Deeprasertkul, C. Reinforcement of natural rubber with silica/carbon black hybrid filler. Polym. Test. 2007, 26, 369–377.
Arrighi, V.; Mcewen, I. J.; Qian, H.; Prieto, M. B. S. The glass transition and interfacial layer in styrene–butadiene rubber containing silica nanofiller. Polymer 2003, 44, 6259–6266.
Stöckelhuber, K. W.; Svistkov, A. S.; Pelevin, A. G.; Heinrich, G. Impact of filler surface modification on large scale mechanics of styrene butadiene/silica rubber composites. Macro olecules 2011, 44,4366–4381.
Yatsuyanagi, F.; Suzuki, N.; Ito, M.; Kaidou, H. Effects of secondary structure of fillers on the mechanical properties of silica filled rubber systems. Polymer 2001, 42, 9523–9529.
He, A. H.; Huang, B. C.; Jiao, S. K.; Hu, Y. L. Synthesis of a high–trans–1,4–butadiene/isoprene copolymers with supported titanium catalysts. J. Appl. Polym. Sci. 2003, 89,1800–1807.
Jiang, X. B.; Zhang, Q. F.; He, A. H. Synthesis and characterization of trans–1,4–butadiene/isoprene copolymers: Determination of sequence distribution and thermal properties. Chinese J. Polym. Sci. 2015, 33, 815–822.
Zhang, Q. F.; Jiang, X. B.; He, A. H. Synthesis and characterization of trans–1,4–butadiene/isoprene copolymers: Determination of monomer reactivity ratios and temperature dependence. Chinese J. Polym. Sci. 2014, 32, 1068–1076.
He, A. Synthesis of high trans–1,4–butadiene–isoprene copolymers by supported titanium catalysts. Acta Polymerica Sinica (in Chinese) 2002, 83, 19–24.
Niu, Q. T.; Jiang, X. B.; He, A. H. Synthesis of the spherical trans–1,4–polyisoprene/trans–1,4–poly(butadiene–co–isoprene) rubber alloys within reactor. Polymer 2014, 55, 2146–2152.
Niu, Q. T.; Zou, C.; Liu, X. Y.; Wang, R. G.; He, A. H. Isothermal crystallization fractionation and fraction characterization of /rans–1,4–poly(isoprene–co–butadiene). Polymer 2017, 109, 197–204.
Wang, H.; Zou, C.; He, A. H. Characterization of trans–1,4–poly(butadiene–co–isoprene) copolymer rubber and its application as hump strip stocks in PCR tires. Acta Polymerica Sinica (in Chinese) 2015, 22, 296–305.
He, A. H.; Yao, W.; Huang, B. C. Properties of a new synthetic rubber: High–/rans–1,4–poly(butadiene–co–isoprene) rubber. J. Appl. Polym. Sci. 2004, 92, 2941–2948.
Wang, H.; Cui, H. H.; Ma, Y. S.; Zhang, J. P.; Song, L. Y.; He, A. H. The study of trans–1,4–poly(butadiene–co–isoprene) copolymer rubbers as tire belts stocks. Polym. Bull. 2016, 61–67.
Wang, H.; Song, L. Y.; Ma, Y. S.; Wang, R. G.; He, A. H. The structures and properties of high performance PCR tire tread stock modified with trans–1,4–poly(butadiene–co–isoprene) copolymer rubber. Acta Polymerica Sinica (in Chinese) 2018, 419–428.
Zhang, X. P.; Cui, H. H.; Song, L. Y.; Ren, H. C.; Wang, R. G.; He, A. H. Elastomer nanocomposites with superior dynamic mechanical properties via trans–1,4–poly(butadiene–co–isoprene) incorporation. Compos. Sci. Technol. 2018, 158, 156–163.
Wang, H.; Zhang, J. P.; Wang, R. G.; He, A. H. Properties of nature rubber/high trans–1,4–poly(butadiene–co–isoprene) rubber blends. China Rubber Ind. 2018, 65, 167–172.
Zhang, Z. P.; Wang, H.; Ren, H. C.; Wang, R. G.; He, A. H. Rubber nanocomposites with nano–scale phase structures and kinetically inhibited filler flocculation for enhanced integrated performances via reactive multi–block copolymer incorporation. Ind. Eng. Chem. Res. 2019, 58, 917–925.
Wang, H.; Zhang, X. P.; Nie, H. R.; Wang, R. G.; He, A. H. Multi–block copolymer as reactive multifunctional compatibilizer for NR/BR blends with desired network structures and dynamical properties: Compatibility, co–vulcanization and filler dispersion. Comps. Part A 2019, 116, 197–205.
Boochathum, P.; Prajudtake, W. Vulcanization of cis–and trans–polyisoprene and their blends: Cure characteristics and crosslink distribution. Eur. Polym. J. 2001, 37, 417–427.
Niu, Q. T.; Li, W. T.; Liu, X. Y.; He, A. H. Trans–1,4–stereospecific copolymerization of isoprene and butadiene catalyzed by TiCl4/MgCl2 type Ziegler–Natta catalyst I I. Copolymerization kinetics and mechanism. Polymer 2018, 143, 173–183.
Li, W. T.; Nie, H. R.; Shao, H. F.; Ren, H. C.; He, A. H. Synthesis, chain structures and phase morphologies of trans–1,4–poly(butadiene–co–isoprene) copolymers. Polymer 2018, 156, 148–161.
Marigo, A.; Marega, C.; Causin, V.; Ferrari, P. Influence of thermal treatments, molecular weight, and molecular weight distribution on the crystallization of–isotactic polypropylene. J. Appl. Polym. Sci. 2010, 91, 1008–1012.
Benedetti, E.; D'Alessio, A.; Bertolutti, C.; Vergamini, P.; Fanti, N. D.; Pianca, M. Influence of molecular weight on the crystallization of poly(vinylidene fluoride). Polym. Bull. 1989, 22, 645–651.
Shao, H.; Wang, S.; He, A. The influence of molecular weight on high shear rate macroscopic rheological properties of polybutene–1 melts through rubber–processing analyzer. Polym. Bull. 2016, 73, 3209–3220.
Yuan, M.; Galloway, J. A.; Hoffman, R. J. Influence of molecular weight on rheological, thermal, and mechanical properties of PEEK. Polym. Eng. Sci. 2011, 51, 94–102.
Jordens, K.; Wilkes, G. L.; Janzen, J.; Rohlfing, D. C.; Welch, M. B. The influence of molecular weight and thermal history on the thermal, rheological, and mechanical properties of metallocene–catalyzed linear polyethylenes. Polymer 2000, 41, 7175–7192.
Zuiderduin, W. C. J.; Homminga, D. S.; Huetink, H. J.; Gaymans, R. J. Influence of molecular weight on the fracture properties of aliphatic polyketone terpolymers. Polymer 2003, 44, 6361–6370.
Nunes, R. W.; Martin, J. R.; Johnson, J. F. Influence of molecular weight and molecular weight distribution on mechanical properties of polymers. Polym. Eng. Sci. 2010, 22,205–228.
Ismail, H.; Freakley, P. K.; Sutherland, I.; Sheng, E. Effects of multifunctional additive on mechanical properties of silica filled natural rubber compound. Eur. Polym. J. 1995, 31, 1109–1117.
Liu, X.; Zhao, S. H.; Zhang, X. Y.; Li, X. L.; Bai, Y. Preparation, structure, and properties of solution–polymerized styrenebutadiene rubber with functionalized end–groups and its silicafilled composites. Polymer 2014, 55,1964–1976.
Huneau, B.; Masquelier, I.; Marco, Y.; Saux, V. L.; Noizet, S.; Schiel, C.; Charrier, P. Fatigue crack initiation in a carbon black–filled natural rubber. Rubber Chem. Technol. 2016, 89, 126–141.
Acknowledgements
This work was financially supported by the National Basic Research Program of China (No. 2015CB654700 (2015CB 654706)), Major Program of Shandong Province Natural Science Foundation (No. ZR2017ZA0304) and Taishan Scholar Program.
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Invited article for special issue of “The 100th Anniversary of the Birth of Prof. Shi-Lin Yang”
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Wang, H., Wang, RG., Ma, YS. et al. The Influence of Trans-1,4-poly(butadiene-co-isoprene) Copolymer Rubbers (TBIR) with Different Molecular Weights on the NR/TBIR Blends. Chin J Polym Sci 37, 966–973 (2019). https://doi.org/10.1007/s10118-019-2229-9
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DOI: https://doi.org/10.1007/s10118-019-2229-9