Chitin-based polyurethane elastomers (PUEs) were synthesized by step growth polymerization techni... more Chitin-based polyurethane elastomers (PUEs) were synthesized by step growth polymerization techniques using poly( -caprolactone) (PCL) varying diisocyanate and chain extender structures. The viscosity average molecular weight (M v ) of chitin was deduced from the ...
ABSTRACT The use of polymeric materials in some applications is inhibited due to their low therma... more ABSTRACT The use of polymeric materials in some applications is inhibited due to their low thermal conductivity. In this study epoxy nanocomposites of three differently modified carbon nanotubes were prepared and their thermal, electrical and mechanical properties were investigated. Acidic oxidation, amine grafting and Friedel-Crafts reactions were employed to prepare modified carbon nanotubes. It was found that nanocomposites obtained by Friedel-Crafts acylation reaction have superior thermal and electrical conductivity. Therefore, the addition of a very low amount of benzene tricarboxylic acid (BTC) nanotubes can result in a considerable improvement in the thermal and electrical conductivity of the resulting nanocomposite.
... Khalid Mahmood Zia a , Ijaz Ahmad Bhatti a , Corresponding Author Contact Information , E-mai... more ... Khalid Mahmood Zia a , Ijaz Ahmad Bhatti a , Corresponding Author Contact Information , E-mail The Corresponding Author , Mehdi Barikani b , Mohammad ... 1b) were assigned as: 3447 cm −1 (OH stretching vibration); 2949 cm −1 (asymmetric CH 2 stretching); 2865 cm −1 ...
Shape memory polyurethanes (SMPUs) are playing a prominent role in biomedical, self repairing, ae... more Shape memory polyurethanes (SMPUs) are playing a prominent role in biomedical, self repairing, aerospace and smart materials. Shape memory polyurethanes (SMPUs) were prepared from polycaprolactone diol 4000 (PCL4000), 1-4-butanediol (BDO), chitin, dimethylol ...
... E-mail: [email protected] ABSTRACT Key Words: Morphological Studies of Polyurethane Elast... more ... E-mail: [email protected] ABSTRACT Key Words: Morphological Studies of Polyurethane Elastomers Extended with α,ω Alkane Diols Khalid Mahmood Zia1, Mehdi Barikani*2, Mohammad Zuber3, Ijaz Ahmad Bhatti1, and Haq Nawaz Bhatti1 ...
Chitin based polyurethane bio-nanocomposites (PUBNC) were prepared by emulsion polymerization. Th... more Chitin based polyurethane bio-nanocomposites (PUBNC) were prepared by emulsion polymerization. The existence of the intercalated clay by polyurethane (PU) in the hybrid was confirmed using X-ray diffraction (XRD), dynamic mechanical measurements and optical ...
... The main decrease in the band intensities can be associated with the loss of the urethane str... more ... The main decrease in the band intensities can be associated with the loss of the urethane structure during UV-irradiation. It is well known that in the PU structures oxygen attacks at CH 2 groups in the aliphatic diol part, with hydro-peroxides formation [22]. ...
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2009
A series of polyurethane elastomers were prepared by the reaction of poly ε-caprolactone and 4,4′... more A series of polyurethane elastomers were prepared by the reaction of poly ε-caprolactone and 4,4′-diphenylmethane diisocyanate. The prepolymer was extended using α, ω-alkane diols as chain extenders having 210 methylene units in their structure. The synthesized ...
Biodegradable polyurethane elastomers with potential for biomedical application as non-absorbable... more Biodegradable polyurethane elastomers with potential for biomedical application as non-absorbable sutures with improved hydrophobic properties were synthesized by the reaction of poly(ε-caprolactone) (PCL) and 4,4′-diphenylmethane diisocyanate (MDI), extended ...
Chitin-based polyurethane elastomers (PUEs) were synthesized by step growth polymerization techni... more Chitin-based polyurethane elastomers (PUEs) were synthesized by step growth polymerization techniques using poly( -caprolactone) (PCL) varying diisocyanate and chain extender structures. The viscosity average molecular weight (M v ) of chitin was deduced from the ...
ABSTRACT The use of polymeric materials in some applications is inhibited due to their low therma... more ABSTRACT The use of polymeric materials in some applications is inhibited due to their low thermal conductivity. In this study epoxy nanocomposites of three differently modified carbon nanotubes were prepared and their thermal, electrical and mechanical properties were investigated. Acidic oxidation, amine grafting and Friedel-Crafts reactions were employed to prepare modified carbon nanotubes. It was found that nanocomposites obtained by Friedel-Crafts acylation reaction have superior thermal and electrical conductivity. Therefore, the addition of a very low amount of benzene tricarboxylic acid (BTC) nanotubes can result in a considerable improvement in the thermal and electrical conductivity of the resulting nanocomposite.
... Khalid Mahmood Zia a , Ijaz Ahmad Bhatti a , Corresponding Author Contact Information , E-mai... more ... Khalid Mahmood Zia a , Ijaz Ahmad Bhatti a , Corresponding Author Contact Information , E-mail The Corresponding Author , Mehdi Barikani b , Mohammad ... 1b) were assigned as: 3447 cm −1 (OH stretching vibration); 2949 cm −1 (asymmetric CH 2 stretching); 2865 cm −1 ...
Shape memory polyurethanes (SMPUs) are playing a prominent role in biomedical, self repairing, ae... more Shape memory polyurethanes (SMPUs) are playing a prominent role in biomedical, self repairing, aerospace and smart materials. Shape memory polyurethanes (SMPUs) were prepared from polycaprolactone diol 4000 (PCL4000), 1-4-butanediol (BDO), chitin, dimethylol ...
... E-mail: [email protected] ABSTRACT Key Words: Morphological Studies of Polyurethane Elast... more ... E-mail: [email protected] ABSTRACT Key Words: Morphological Studies of Polyurethane Elastomers Extended with α,ω Alkane Diols Khalid Mahmood Zia1, Mehdi Barikani*2, Mohammad Zuber3, Ijaz Ahmad Bhatti1, and Haq Nawaz Bhatti1 ...
Chitin based polyurethane bio-nanocomposites (PUBNC) were prepared by emulsion polymerization. Th... more Chitin based polyurethane bio-nanocomposites (PUBNC) were prepared by emulsion polymerization. The existence of the intercalated clay by polyurethane (PU) in the hybrid was confirmed using X-ray diffraction (XRD), dynamic mechanical measurements and optical ...
... The main decrease in the band intensities can be associated with the loss of the urethane str... more ... The main decrease in the band intensities can be associated with the loss of the urethane structure during UV-irradiation. It is well known that in the PU structures oxygen attacks at CH 2 groups in the aliphatic diol part, with hydro-peroxides formation [22]. ...
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2009
A series of polyurethane elastomers were prepared by the reaction of poly ε-caprolactone and 4,4′... more A series of polyurethane elastomers were prepared by the reaction of poly ε-caprolactone and 4,4′-diphenylmethane diisocyanate. The prepolymer was extended using α, ω-alkane diols as chain extenders having 210 methylene units in their structure. The synthesized ...
Biodegradable polyurethane elastomers with potential for biomedical application as non-absorbable... more Biodegradable polyurethane elastomers with potential for biomedical application as non-absorbable sutures with improved hydrophobic properties were synthesized by the reaction of poly(ε-caprolactone) (PCL) and 4,4′-diphenylmethane diisocyanate (MDI), extended ...
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