Strain-induced crystallization behaviour of natural rubbers from guayule and rubber dandelion revealed by simultaneous time-resolved WAXD/tensile measurements: indispensable function for sustainable resources

Because strain-induced crystallization (SIC) behaviour is the key for predicting the performance of alternatives to Hevea natural rubber, characteristics of the SIC of sulfur crosslinked guayule and dandelion natural rubbers were investigated using quick in situ simultaneous synchrotron time-resolved wide-angle X-ray diffraction/tensile measurements, for the first time. The SIC of sulfur crosslinked Hevea natural rubber was also evaluated for comparison. The SIC phenomena were clearly observed when guayule and dandelion natural rubbers were purified using acetone, then crosslinked with sulfur and subjected to strain. Guayule natural rubber showed a superior SIC upon high stretching to Hevea natural rubber, whereas dandelion natural rubber had a similar SIC to Hevea. The crosslinked guayule natural rubber had larger oriented amorphous components and larger crystallite sizes parallel to the stretching direction than the crosslinked dandelion and Hevea natural rubbers. These characteristic features resulted in larger crystallite volumes and lower orientation fluctuations of the crystallites in guayule natural rubber than in the others. It was speculated that the differences were because of their macromolecular structures and the amounts of non-rubber components in their matrixes. However, the SIC results clearly support the fact that both guayule and dandelion natural rubbers are the real alternatives to Hevea natural rubber.

[1]  K. Brüning.  In-situ Structure Characterization of Elastomers during Deformation and Fracture , 2014 .

[2]  F. Lloyd.  Guayule (Parthenium argentatum Gray) : a rubber-plant of the Chihuahuan Desert. , 1911 .

[3]  S. Kohjiya,et al.  Structural development of natural rubber during uniaxial stretching by in situ wide angle X-ray diffraction using a synchrotron radiation , 2002 .

[4]  Shinzo Kohjiya,et al.  Orientation and Crystallization of Natural Rubber Network As Revealed by WAXD Using Synchrotron Radiation , 2004 .

[5]  J. B. van Beilen,et al.  Guayule and Russian Dandelion as Alternative Sources of Natural Rubber , 2007, Critical reviews in biotechnology.

[6]  L. Valle,et al.  Cohesive Strength in Guayule Rubber and Its Improvement through Chemical Promotion , 1978 .

[7]  T. Hahn.  International tables for crystallography , 2002 .

[8]  F. S. Nakayama,et al.  Gravimetric Analysis for Determining the Resin and Rubber Content of Guayule , 1983 .

[9]  Y. Ikeda,et al.  Nonuniformity in natural rubber as revealed by small-angle neutron scattering, small-angle X-ray scattering, and atomic force microscopy. , 2007, Biomacromolecules.

[10]  James L White,et al.  A comparative study of stress‐induced crystallization of guayule, hevea, and synthetic polyisoprenes , 1982 .

[11]  Luiz H. C. Mattoso,et al.  Technological properties of latex and natural rubber of Hevea brasiliensis clones , 2005 .

[12]  J. Sakdapipanich,et al.  Characterization of associated proteins and phospholipids in natural rubber latex. , 2011, Journal of bioscience and bioengineering.

[13]  L. Alexander,et al.  X-Ray diffraction procedures for polycrystalline and amorphous materials , 1974 .

[14]  G. Guerra,et al.  Crystallinity and crystalline phase orientation of poly(1,4‐cis‐isoprene) from Hevea brasiliensis and Taraxacum kok‐saghyz , 2016 .

[15]  Shinzo Kohjiya,et al.  New Insights into Structural Development in Natural Rubber during Uniaxial Deformation by In Situ Synchrotron X-ray Diffraction , 2002 .

[16]  K. Cornish,et al.  Hypoallergenicity of guayule rubber particle proteins compared to Hevea latex proteins , 1994 .

[17]  R. Schultes.  The history of taxonomic studies in Hevea , 1970, The Botanical Review.

[18]  C. M. Roland,et al.  Strain-Crystallization of Guayule and Hevea Rubbers , 1997 .

[19]  D. Kostyal,et al.  Protein influences on guayule and Hevea natural rubber sol and gel , 2015 .

[20]  C. M. Roland,et al.  Role of strain crystallization in the fatigue resistance of double network elastomers , 2003 .

[21]  L. Valle.  Vulcanization of Guayule Rubber , 1981 .

[22]  A. J. Verbiscar,et al.  An Infrared Spectrophotometric Analysis for Natural Rubber in Guayule Shrubs , 1982 .

[23]  D. Mcintyre,et al.  Chemistry and Structure of Natural Rubbers , 1979 .

[24]  K. Cornish,et al.  Improved methods for extraction and quantification of resin and rubber from guayule , 2009 .

[25]  Y. Ikeda,et al.  Two-Phase Network Formation in Sulfur Crosslinking Reaction of Isoprene Rubber , 2014 .

[26]  P. Albouy,et al.  Stress-Induced Crystallization around a Crack Tip in Natural Rubber , 2002 .

[27]  Y. Ikeda,et al.  Dinuclear Bridging Bidentate Zinc/Stearate Complex in Sulfur Cross-Linking of Rubber , 2015 .

[28]  Y. Ikeda,et al.  Vulcanization: New Focus on a Traditional Technology by Small-Angle Neutron Scattering , 2009 .

[29]  Anvar U. Buranov,et al.  Extraction and characterization of latex and natural rubber from rubber-bearing plants. , 2010, Journal of agricultural and food chemistry.

[30]  W. W. Schloman.  Processing guayule for latex and bulk rubber , 2005 .

[31]  Guangsu Huang,et al.  A rheological study on non-rubber component networks in natural rubber , 2015 .

[32]  K. Cornish,et al.  Characterization and Performance Testing of Guayule Latex , 1996 .

[33]  Shinzo Kohjiya,et al.  Effect of Network-Chain Length on Strain-Induced Crystallization of NR and IR Vulcanizates , 2004 .

[34]  P. Flory.  Statistical Mechanics of Swelling of Network Structures , 1950 .

[35]  H. Mooibroek,et al.  Alternative sources of natural rubber , 2000, Applied Microbiology and Biotechnology.

[36]  M. Finlay.  Growing American Rubber: Strategic Plants and the Politics of National Security , 2009 .

[37]  Thierry Biben,et al.  Strain-Induced Crystallization of Natural Rubber and Cross-Link Densities Heterogeneities , 2014 .

[38]  Shinzo Kohjiya,et al.  Comparative Study on Strain-Induced Crystallization Behavior of Peroxide Cross-Linked and Sulfur Cross-Linked Natural Rubber , 2008 .