?LATEXES FROM EUPHORBIA CADUCIFOLIA - ISOLATION AND CHARACTERISATION OF RUBBER HYDROCARBON. PART - I

Authors

  • A Rasheed Khan H.No. R-157, Abid Town, Gulshan-e-Iqbal 1-2, Karachi, Pakistan
  • Tehzeeb Akhtar PCSIR Laboratories Complex Karachi, Karachi 75280, Pakistan

Keywords:

Latex, Euphorbia caducifolia, Hydrocarbon, 13C-NMR spectrum.

Abstract

Latex was collected by incising the stem of E.caducifolia plant which contains 26.90 - 28.60% solid material. The chemical
composition of solid material shows resinous mass 68.30 - 72.70%, where as rubber hydrocarbon is around 6.20 - 7.60 and
inorganic matters lie in the range 19.00 - 22.90% and 1.50 - 1.90%, respectively. The rubber hydrocarbon was characterised
by different chemical and instrumental methods. Iodine value of hydrocarbon (310.91 - 350.80%) percentage of unsaturation (83.40 - 94.10%), elemental analysis (C = 87.48 - 88.04%, H = 11.20 - 11.82%), solubility, IR spectrum (840 cm-1),
1H-NMR spectrum (olefinic proton at 5.15 - 5.20%), 13C-NMR spectrum (olefinic region 120 - 140 ppm), molecular
weight (15275 - 88405), the value of Tg (- 63.02 - 60.81°C), refractive index (1.49200 to 1.49325) and specific gravity
(0.93102 to 0.93628) identify rubber hydrocarbon as polyisoprene. The material is sticky and poor in strength and burning
gives a smoky flame.

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Published

2003-10-20

How to Cite

Khan, A. R., & Akhtar, T. (2003). ?LATEXES FROM EUPHORBIA CADUCIFOLIA - ISOLATION AND CHARACTERISATION OF RUBBER HYDROCARBON. PART - I. Biological Sciences - PJSIR, 46(5), 311–316. Retrieved from https://v2.pjsir.org/index.php/biological-sciences/article/view/1657

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