Studies on chain extension of a novel bio-based engineering elastomer using 4,4-diphenyl methane diisocyanate as a chain extender

Lei Jiang, Hailan Kang, Zhao Wang, Liqun Zhang, Lixin Mao, Yiqing Wang

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4 Citations (Scopus)


A novel hydroxyl-terminated bio-based engineering elastomer (BEE) was synthesized from four bio-based monomers by adding excess diol. Then the BEE was chain extended in Haake torque rheometer with 4,4-diphenyl methane diisocyanate (MDI) as chain extender. The molar ratio of NCO/OH, reaction temperature and reaction time of the chain-extension reaction were studied, and the optimum condition was determined by the gel permeation chromatography (GPC), soxhlet extraction, and fourier transform infrared spectroscopy (FTIR) results. After chain extension, (i) the number-average molecular weight of BEE became about 3.5 times of the original BEE, (ii) the thermal stability was improved and the crystallization rate was lower, (iii) and the mechanical properties were significantly improved with nano-SiO2 as reinforcing filler. The chain-extended BEE would have potential wide applications in engineering field.

Original languageEnglish
Article number40756
Number of pages6
JournalJournal of Applied Polymer Science
Issue number18
Publication statusPublished - 15 Sept 2014
Externally publishedYes


  • bioengineering
  • biomaterials
  • biopolymers and renewable polymers
  • biosynthesis of polymers
  • elastomers

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