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Catalytic Synthesis of Bulk Hydrophilic Acetaldehyde-Modified Polyamide 46
Högskolan i Borås, Institutionen Ingenjörshögskolan. (Biotechnology)
Högskolan i Borås, Institutionen Ingenjörshögskolan. (Biotechnology)
Högskolan i Borås, Institutionen Ingenjörshögskolan. (Biotechnology)ORCID-id: 0000-0003-4887-2433
2014 (engelsk)Inngår i: Current Organic Synthesis, ISSN 1570-1794, E-ISSN 1875-6271, Vol. 11, nr 6, s. 288-294Artikkel i tidsskrift (Fagfellevurdert) Published
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Abstract [en]

Hydrophilization of Polyamide 46 (PA46) via modification with acetaldehyde in continuous phase was studied. The chemical modification of PA 46 with acetaldehyde resulted in a water-swollen polymer with hydrophilic property. The polyamide 46 undergoes a nucleophilic addition with acetaldehyde in the presence of aluminum chloride as a catalyst. The extent of bulk hydroxyethylation using AlCl3 resulted in 95.65% modification counted as total N-hydroxyethylated polyamide 46. The modification resulted in improved hydrophilic properties, and a maximum surface free energy of 44.6 mJ/m2 was achieved after 3 h reaction, whereas the unmodified PA46 had a surface free energy of 11.2 mJ/m2. In addition, thermal properties of the polymers were studied using differential scanning calorimetry and thermogravimetric analyses. The functionalization leads to decrease in the crystallization energy from 88 J/g to 51 J/g, while the melting energy is changed from 110 J/g to 53 J/g. Furthermore, the thermal stability of the PA46 to pyrolysis was diminished after hydroxylation.

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Bentham Science Publishers Ltd. , 2014. Vol. 11, nr 6, s. 288-294
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Resource Recovery
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URN: urn:nbn:se:hb:diva-1870DOI: 10.2174/1570179411310010003ISI: 000340717600006Lokal ID: 2320/13751OAI: oai:DiVA.org:hb-1870DiVA, id: diva2:869948
Tilgjengelig fra: 2015-11-13 Laget: 2015-11-13 Sist oppdatert: 2017-12-01bibliografisk kontrollert

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Barghi, HamidrezaSkrifvars, MikaelTaherzadeh, Mohammad J.

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