Mixture design approaches to IPDI-H6XDI-XDI ternary diisocyanate-based waterborne polyurethanes

Chien Hsin Yang, Huey Jia Yang, Ten Chin Wen, Ming Sieng Wu, Jian Sheng Chang

研究成果: Article同行評審

52 引文 斯高帕斯(Scopus)

摘要

A systematic modelling analysis for polyaddition of poly(butylene glycol adipate) [PBA] to isophorone diisocyanate (IPDI), xylene diisocyanate (XDI) and hydrogenated xylene diisocyanate (H6XDI) ternary diisocyanate-based waterborne polyurethane (WPU) synthesized by a modified acetone process was performed. Using a mixture of experimental designs, empirical models are fitted and plotted as contour diagrams, which facilitate revealing the synergistic/antagonistic effects between the mixed diisocyanates. The results indicate that each component demonstrates different performances in either binary (IPDI-XDI, XDI-H6XDI and IPDI-H6XDI) or ternary (IPDI-XDI-H6XDI) systems with the IPDI-based WPU, which possesses the highest tensile strength. The largest ultimate elongation occurs at 1/3IPDI/1/3H6XDI/1/3XDI ternary diisocyanate-mixed WPU. Particle size analysis shows that the larger particles are obtained in the dispersion of IPDI-XDI binary WPU. Differential scanning calorimetry (DSC) results show that PBA polyol and its converted WPU show doublet melting behaviour. A plot of 1/T(m)(L) (lower melting temperature) against - 1nX(IPDI) (mole fraction of IPDI in mixed diisocyanates) is approximately linear, indicating that the hard segments are randomly distributed along the molecular chain. Wide angle X-ray diffraction (XRD) and polarized microscopy (POM) on these WPU films were also examined.

原文English
頁(從 - 到)871-885
頁數15
期刊polymer
40
發行號4
DOIs
出版狀態Published - 1998 2月

All Science Journal Classification (ASJC) codes

  • 有機化學
  • 聚合物和塑料
  • 材料化學

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