2-s2.0-85044426241

[vc_empty_space][vc_empty_space]

[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]© 2018 Published by ITB Journal Publisher.Poly(uretha ane) (PU) as a prepolymer was prepared zby polymerization of the diol compound (9-ethoxy-1,10-octadecanediol) and e4,4-methylen-bis phenyl isocyanate (MDI) under nitrogen atmosphere at 85 °C. The 9-ethoxy-1,10-octadecanediol was obtained by several reaction steps, i.e. epoxydatiion of oleic acid obtained from palm oil, ring-opening of oleic acid epoxide, and reduction of oleic acid ester. All compounds obtained in this work were characterized by chem eical structure analysis (FTIR and 1H NMR), supported by analysis of iodine val eue, acid value, and hydroxyl value determined by titration methods and thermal eanalysis, especially for poly(urethane). The 9-ethoxy-1,10-octadecanediol as the odiol compound for preparation of poly(urethane)) was analyzed by FTIR, supported by hydroxyl numbers determined by titration. Poly(urethane-urea) (PUU) was obtained by addition of ethylene diamine as chain extender to poly T(urethane). The thermal stability of poly(urethane-urrea) is higher than that of poly(urethane). The addition of ethylene diamine as chain extender in poly(urethane) can improve the intrinsic viscosity of polymer to form poly(urethane-urea). T ahese results are supported by chemical structure analysis.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]10-octadecanediol,9-ethoxy-1,Oleic acid,Palm oil,Poly(urethane-urea),Synthesis[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][{‘$’: ‘The FTIR spectra of 9-ethoxy-1,10-octadecanediol exhibit peak intensity of hydroxy groups at 3450 cm-1 (Figure 7b) and a new absorption peak appeared around 3228.6 cm-1, which is a typical absorption peak of asymmetric stretching of the -OH group (Figure 7b), whereas new absorption peaks disappeared around 2673 cm-1 and 1708.9 cm-1, which are typical absorption peaks of the – COOH or the –COOCH-group and stretching vibration of the –C=O group, respectively. These results indicate the change of 9-ethoxy-10-hydroxyoctadecanoic ethyl ester to produce 9-ethoxy-1,10-octadecanediol. This result was supported by analysis of the hydroxyl numbers before and after reduction of oleic acid ester determined by titration. The hydroxyl number for 9-ethoxy-10-hydroxy-octadecanoic ethyl ester is 145.6 mg KOH/g, and after reduction by using NaBH4/AlCl3, and HCl produces 9-ethoxy-1,10-octadecanediol, which has a hydroxyl number of 322.0 mg KOH/g.’}, {‘$’: ‘The authors gratefully acknowledge the financial support received from the Research Grant of the Competition Research Program under the Directorate of Higher Education, Department of National Education, the Republic of Indonesia and the Institute for Research – LPPM, Institut Teknologi Bandung (ITB).’}][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.5614/j.math.fund.sci.2018.50.1.2[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]