Dynamically vulcanized polylactide/nitrile butadiene rubber blends with continuous cross-linked rubber phase

  • Lin Zhang
  • Jing Hua
  • Zhaobo WangEmail author


Thermoplastic vulcanizates (TPVs) based on polylactide (PLA)/nitrile butadiene rubber (NBR) blends were prepared by dynamic vulcanization and the PLA matrix was plasticized by dioctyl phthalate (DOP). The surface morphologies of the etched PLA/DOP/NBR TPVs were studied by field emission scanning electron microscope, and the element contents in the TPV surface were characterized by energy dispersive X-Ray spectroscopy; moreover, the dissolution/swell behaviors, infrared spectra and rheological behavior of the prepared PLA/DOP/NBR TPV were also characterized. Experimental results indicated that the cross-linked NBR in the PLA/DOP/NBR TPVs owned a continuous network-like structure due to the much difference in the viscosity between the NBR rubber and the PLA resin. This unique finding breaks the traditional concept of a sea-island morphology which was formed after dynamic vulcanization of the thermoplastic resin/rubber blends. PLA grafted onto NBR under the action of DCP vulcanizing agent, leading to the improving interface compatibility. It should be noted that this PLA/DOP/NBR TPV with the novel microstructure has never been reported.


Dynamic vulcanization Polylactide Nitrile butadiene rubber Co-continuous Morphology 



The work was supported by Shandong Provincial Natural Science Foundation, China (ZR2017MEM021;ZR2016EMM03) and Upgraded Project of Shandong Province for Guidance Ability of Graduate Tutors (SDYY17044).

Compliance with ethical standards


This manuscript has not been published elsewhere and it has not been submitted simultaneously for publication elsewhere.


  1. 1.
    Fukumori K, Kurauchi T (1985) Static fatigue of thermoplastic elastomers. J Polym Res 20:1725–1732Google Scholar
  2. 2.
    Wu JR, Pan QY, Huang GS (2007) Study on the morphology, rheology and surface of dynamically vulcanized chlorinated butyl rubber/polyethylacrylate extrudates: effect of extrusion temperature and times. J Mater Sci 42:4494–4501CrossRefGoogle Scholar
  3. 3.
    Khosrokhavar R, Bakhshandeh GR, Ghoreishy MHR, Naderi G (2008) PP/EPDM blends and their developments up to nanocomposites. J Reinf Plast Compos 28:613–639CrossRefGoogle Scholar
  4. 4.
    Gessler AM, Haslett WH (1962) Process for preparing a vulcanized blend of crystalline polypropylene and chlorinated butyl rubber. US Pat 3:037,954Google Scholar
  5. 5.
    Fischer WK (1973) Thermoplastic blend of partially cured monoolefin copolymer rubber and polyolefin plastic. US Pat 3:758,643Google Scholar
  6. 6.
    Coran AY, Patel RP (1980) Rubber-thermoplastic compositions. Part I. EPDM-polypropylene thermoplastic vulcanizates. Rubber Chem Technol 53:141–150CrossRefGoogle Scholar
  7. 7.
    Coran AY, Patel RP (1983) Rubber-thermoplastic compositions. Part VIII. Nitrile rubber polyolefin blends with technological compatibilization. Rubber Chem Technol 56:1045–1060CrossRefGoogle Scholar
  8. 8.
    Tian M, Han J, Zou H, Tian H, Wu H, She Q, Chen W, Zhang L (2012) Dramatic influence of compatibility on crystallization behavior and morphology of polypropylene in NBR/PP thermoplastic vulcanizates. J Polym Res 19:9745–9757CrossRefGoogle Scholar
  9. 9.
    Jin KK, Lee SH, Hwang SH (2003) Study on the thermoplastic vulcanizate using ultrasonically treated rubber powder. J Appl Polym Sci 90:2503–2507CrossRefGoogle Scholar
  10. 10.
    Soeda Y, Zhang X, Matsuda Y, Tasaka S (2009) Lamellar structure of a reactive blend of 1,2-polybutadiene and nylon 11. J Thermoplast Compos 22:353–364CrossRefGoogle Scholar
  11. 11.
    Wu JH, Li CH, Chiu HT, Shong ZJ, Tsai PA (2009) Reinforcement of dynamically vulcanized EPDM/PP elastomers using organolclay fillers: dynamic properties of rubber vibration isolators and antivibration performance. J Thermoplast Compos 22:503–517CrossRefGoogle Scholar
  12. 12.
    Wu H, Ning N, Zhang L, Tian H, Wu Y, Tian M (2013) Effect of additives on the morphology evolution of EPDM/PP TPVs during dynamic vulcanization in a twin-screw extruder. J Polym Res 20:266–273CrossRefGoogle Scholar
  13. 13.
    Chen Y, Yuan D, Xu C (2014) Dynamically vulcanized biobased Polylactide/natural rubber blend material with continuous cross-linked rubber phase. ACS Appl Mater Interfaces 6:3811–3816CrossRefGoogle Scholar
  14. 14.
    Yuan D, Ding J, Mou W, Wang Y, Chen Y (2017) Bio-based polylactide/epoxidized natural rubber thermoplastic vulcanizates with a co-continuous phase structure. Polym Test 64:200–206CrossRefGoogle Scholar
  15. 15.
    Prasitnok K (2018) Coarse-grained modelling of self-assembling poly (ethylene glycol)/poly(lactic acid) diblock copolymers. J Polym Res 25:69–77CrossRefGoogle Scholar
  16. 16.
    Krishnan S, Mohanty S, Nayak SK (2018) An eco-friendly approach for toughening of polylactic acid from itaconic acid based elastomer. J Polym Res 25:10–17CrossRefGoogle Scholar
  17. 17.
    Shi X, Wang L, Kang Y, Qin J, Li J, Zhang H, Fan X, Liu Y, Zhang G (2018) Effect of poly(butylenes succinate) on the microcellular foaming of polylactide using supercritical carbon dioxide. J Polym Res 25:229–240CrossRefGoogle Scholar
  18. 18.
    Shih YF, Huang CC, Chen PW (2010) Biodegradable green composites reinforced by the fiber recycling from disposable chopsticks. Mat Sci Eng A-Struct 527:1516–1521CrossRefGoogle Scholar
  19. 19.
    Ma P, Xu P, Zhai Y, Dong W, Zhang Y, Chen M (2015) Bio-based and degradable poly(lactide)/ethylene-co-vinyl acetate thermoplastic vulcanizates: morphology evolution, superior properties, and partial degradability. ACS Sustain Chem Eng 3:2211–2219CrossRefGoogle Scholar
  20. 20.
    Wu SH (1987) Formation of dispersed phase in incompatible polymer blends: interfacial and rheological effects. Polym Eng Sci 27:335–343CrossRefGoogle Scholar
  21. 21.
    Sundararaj U, Macosko CW (1995) Drop breakup and coalescence in polymer blends: the effects of concentration and Compatibilization. Macromolecules 28:2647–2657CrossRefGoogle Scholar

Copyright information

© The Polymer Society, Taipei 2018

Authors and Affiliations

  1. 1.College of Materials Science & EngineeringQingdao University of Science & TechnologyQingdaoPeople’s Republic of China

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