A series of segmented polyurethanes (SPUs), based on hexamethylene diisocyanate (HDI) and polytetramethylene glycol (PTMG) as soft segments and then extended with alkylene di(4-hydroxybenzoate), HB as hard segments, were synthesized in this study. The effect of the number of methylene units in HB (f
Synthesis and properties of segmented polyurethane using phenolphthalein as chain extenders
β Scribed by H. Rajan; P. Rajalingam; Ganga Radhakrishnan
- Publisher
- John Wiley and Sons
- Year
- 1993
- Tongue
- English
- Weight
- 335 KB
- Volume
- 48
- Category
- Article
- ISSN
- 0021-8995
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β¦ Synopsis
Three series of novel polyurethane elastomers containing phenolphthalein as chain extenders were synthesized. The structure of the polyurethane was analyzed using IR and wide-angle X-ray diffraction studies. Tensile strength and percentage of elongation of all the series of polymers were studied. Thermal decomposition was studied using differential scanning calorimetry.
π SIMILAR VOLUMES
## Abstract Various segmented polyurethanes with a hard segment content of about 50 wt% were prepared from 4,4β²βdiphenylmethane diisocyanate (MDI), a poly(tetramethylene adipate) glycol with an __M__~n~ of 2000, and various combinations of aliphatic diols as chain extenders by a oneβshot, handβcast