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L. Jin, M. D. Zhu and L. Zhen, “FTIR Studies on the Compatibility of Hard-Soft Segments for Polyurethane- imide Copolymers with Different Soft Segments,” Euro- pean Polymer Journal, Vol. 38, No. 4, 2002, pp. 661-665. doi:10.1016/S0014-3057(01)00247-6

has been cited by the following article:

• TITLE: Chemical Analyses of Palm Kernel Oil-Based Polyurethane Prepolymer

  AUTHORS: Chee Sien Wong, Khairiah Haji Badri

  KEYWORDS: Palm Kernel Oil; Prepolymerization; Polyurethane; Soft Segment; Hard Segment

  JOURNAL NAME: Materials Sciences and Applications, Vol.3 No.2, February 17, 2012

  ABSTRACT: Polyurethane (PU) was prepared from palm kernel oil-based monoester polyol (PKO-p) via prepolymerization method at NCO/OH ratio of 200/100, 150/100, 100/100, and 75/100 at ambient temperature under nitrogen gas atmosphere. The structure of the synthesized prepolymerized PKO-p PU was determined using FTIR and 13C NMR. The disapperance of NCO peak in the FTIR spectrum at 2270 cm–1 - 2250 cm–1 cm showed that MDI has completely reacted to form PU. The appearance of C=O peak at 1700 cm–1 indicated that hydrogen bonding was formed between the soft segmented chain of the PKO-p and the hard segmented MDI. Hence, urethane bond was the main polymeric chain in the PU.