Szycher's Handbook of Polyurethanes

Szycher, Michael; D., Ph.

doi:10.1201/b12343

Cited by 259 publications

(70 citation statements)

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“…The lower conversion of polyol leads to poor mechanical strength in the corresponding polyurethane [27]. In an attempt to increase the conversion to the desired level, the molar ratio of epoxide/EG was 1:05 (mol/mol) at 50 °C.…”

Section: Resultsmentioning

confidence: 99%

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Synthesis and Characterization of Soy-Based Polyurethane Foam with Utilization of Ethylene Glycol in Polyol

Firdaus

2014

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The use of vegetable oils on replacing petroleum has attracted attention of many researchers. The chemical structure of vegetable oils are different from petrochemicals, so the structure of soybean oil has to be chemically modified through its unsaturated fatty acid chain in triglyceride. A two step process was conducted for the preparation of soy-polyol in designated temperatures; 50 °C, 60 °C, and 70 °C. Ethylene glycol (EG) as co-reagent was taking part in soy-polyol synthesis, and the soy-polyol was used as a sole polyol for polyurethane synthesis. Referred to the previous study, the existence of EG in polyurethane synthesis can improved physical properties of polyurethane foam. The aim of this research is using soy-derived polyol for petro-polyol replacement aligned with drop-off of petro-derived reagent; EG. One step process was applied for the foam synthesis. The ingredients for foam synthesis; soy-polyol, Toluene diisocyanate (TDI): a mixture of 2.4 and 2.6 isomers in ratio of 80:20 (TDI T-80), surfactant, and distilled water. The synergize of stoichiometry ratio of co-reagent EG to soy-epoxide with best temperature, with the absence of EG in polyurethane formula can produce an ultimate property of polyurethane foam. Abstrak Sintesis dan Karakterisasi Busa Poliuretan Berbasis Kedelai Menggunakan Etilen Glikol dalam Poliol.Penggunaan minyak sayur sebagai pengganti minyak bumi menjadi perhatian banyak peneliti. Struktur kimia minyak sayur berbeda dari minyak bumi, untuk itu diperlukan modifikasi secara kimia rantai tak jenuh asam lemak rantai trigliserida dalam minyak kedelai. Proses dua tahap dilakukan untuk membuat poliol kedelai menggunakan suhu yang telah ditetapkan; 50 °C, 60 °C, dan 70 °C. Etilen Glikol (EG) sebagai co-reagen mengambil bagian dalam sintesis poliol kedelai, dan poliol kedelai menjadi poliol tunggal dalam sintesis poliuretan. Berdasarkan hasil penelitian terdahulu, ditemukan bahwa penggunaan EG pada sintesis poliol dapat memperbaiki sifat fisika busa poliuretan. Tujuan penelitian ini adalah menggunakan poliol kedelai menggantikan poliol minyak bumi dan sejalan dengan menghilangkan reagen yang terbuat dari minyak bumi; EG. Proses satu tahap dilakukan pada sintesis busa. Bahan yang digunakan untuk sintesis busa adalah poliol kedelai, Toluen diisosianat (TDI) adalah campuran isomer 2,4 dan 2,6 pada perbandingan 80:20 (TDI T-80), surfaktan, dan air suling. Sinergi perbandingan stoikiometri antara co-reagen EG dengan epoksida kedelai pada suhu terbaik, meski tanpa penambahan EG pada pembuatan poliuretan menghasilkan sifat akhir busa poliuretan.

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Section: Resultsmentioning

confidence: 99%

“…All of the products were in a tolerable range, from as low as 1.2 pcf to as high as 2.5 pcf. Density of reference is 0.9 to 2.5 pcf [27]. The density usually varied with the hydroxyl number of each polyol mixture.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Soy-Based Polyurethane Foam with Utilization of Ethylene Glycol in Polyol

Firdaus

2014

MST

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“…The presence of hydroxy group allows to create a series of polyurethane materials [1][2][3][4][5][6][7][8][9][10], converting -OH groups into isocyanate [11][12][13], chloranhydride [14], epoxy [15], amine [16] groups.…”

Section: Introductionmentioning

confidence: 99%

“…Among all known polymers with functional groups the products with hydroxy groups are of special interest [1][2][3][4]. The presence of hydroxy group allows to create a series of polyurethane materials [1][2][3][4][5][6][7][8][9][10], converting -OH groups into isocyanate [11][12][13], chloranhydride [14], epoxy [15], amine [16] groups.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Properties of Oligomers with Hydroxy End-Groups

Ivashkiv¹,

Namieśnik²,

Shyshchak³

et al. 2016

ChChT

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“…This is the reason why this material is used in different and numerous applications. Some applications of these materials are biomedical, coating and adhesive applications [26,27]. When incorporated in a polyurethane chain, the coumarin monomer was introduced as a chain end [20,28] or as a chain extender [19].…”

mentioning

confidence: 99%