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난연제 종류에 따른 연질 폴리우레탄 폼의 난연 특성에 대한 연구
권오덕 ( Oh Deok Kwon ),이주찬 ( Ju Chan Lee ),서기석 ( Ki Seog Seo ),서중석 ( Chung Seok Seo ),김상범 ( Sang Bum Kim ) 한국공업화학회 2013 공업화학 Vol.24 No.2
In this study, the effect of phosphorus flame retardants on the flame retardancy of the flexible polyurethane foam (PUF) was investigated. Tetramethylene bis(orthophosphorylurea) [TBPU] and phosphinyl alkylphosphate ester [CR-530], resorcinol bis diphenylphosphate [RDP], triethyl phosphate [TEP] were used as flame retardants. The results of thermogravimetric analysis (TGA) indicate that TBPU added PUF produces more charred residues than the other flame retardant added PUF. It was found that TBPU added PUF exhibits low mean heat release rate (HRR), peak HRR, effective heat of combusion (EHC), mass loss rate (MLR), CO yield and CO2 compared to those other flame retardants.
노견(老犬)에 발생(發生)한 질섬유종(膣纖維腫)의 외과수술(外科手術) 1예(例)
김명철,김교준,김덕환,조성환,권오덕,Kim, Myung Cheol,Kim, Kyo Joon,Kim, Duck Hwan,Cho, Sung Whan,Kwon, Oh Deok 충남대학교 농업과학연구소 1987 Korean Journal of Agricultural Science Vol.14 No.2
질내(膣內)에 발생(發生)한 종양(腫瘍)으로 인하여 내원(來院)한 13년생(年生) terrier견(犬)에 대하여 회음부(會陰部)를 통한 종탕절제술(腫蕩切除術)을 실시(實施)한 증례(症例)를 보고(報告)한다. 1. 조직학적(組織學的)으로 관찰(觀察)한 결과 섬유종(纖維腫)으로 인정(認定)되었다. 2. 외음순(外陰脣)의 배측연접(背側連接) 상부(上部)의 1cm 폭(幅)을 남겨놓고 질부(膣部)의 배벽(背壁)까지 피부(皮膚) 및 근층(筋層)을 절개(切開)한 후절개창공(後切開創孔)을 통하여 종양물(腫瘍物)들을 절제(切除)한 결과(結果) 외음부(外陰部)의 형태에 변화(變化)를 일으키지 않고 원상(原狀)을 유지(維持)하였다. 3. 절제후(切除後) 현재(現在)까지 (약(約)6개월(個月)) 재발미후(再發微候)는 인정(認定)되지 않았다. A 13 years old terrior dog with vaginal tumor was referred to the animal hospital of Chungnam National University. Resection of vaginal tumor through perineal area was performed. The results obtained were as follows. 1. Histologically, tumor was classified with fibroma. 2. The skin and musculature of the perineal area was incised to the dorsal area of the vaginal wall except I em of width over the dorsal commissure of the vulvar cleft. Through the opening of the wound, pedunculated tumors were amputated and diffused tumors were removed by submucosal resection. After the surgical operation, the original shape of the external area of vulva was not changed. 3. After the resection recurrent sign was not observed up to nowadays for about 6 months.
새로운 인계 난연제가 연질폴리우레탄 폼의 난연성에 미치는 영향
김창범 ( Chang Bum Kim ),서원진 ( Won Jin Seo ),권오덕 ( Oh Deok Kwon ),김상범 ( Sang Bum Kim ) 한국공업화학회 2011 공업화학 Vol.22 No.5
Diphosphoric acid와 1,4-butanediol을 이용하여 tetramethylene bis(orthophosphate)를 합성한 후 이를 urea와 반응시켜 새로운 인계난연제인 tetramethylene bis(orthophosphoryl urea) (TBPU)를 합성하였다. FT-IR을 이용하여 합성된 TBPU의 구조를 확인하였으며, TBPU를 폴리우레탄 폼에 첨가하여 기계적 물성과 열적성질, 난연성능 변화를 측정하였다. TBPU의 함량증가에 따른 폴리우레탄 폼의 기계적 물성 저하는 없음을 확인하였고, 난연제의 함량이 증가함에 따라 난연성능은 증가하였으며, 감압후의 난연성능 측정에서도 난연성능이 유지됨을 확인하였다. TGA를 통한 열적거동실험에서 TBPU가 첨가된 폴리우레탄 폼은 TBPU가 첨가되지 않은 폴리우레탄 폼에 비해 내열성이 향상됨을 확인 할 수 있었다. Novel phosphrous flame retardant tetramethylene bis(orthophosphorylurea) (TBPU) was synthesized by the reaction of diphosphoric acid with 1,4-butanediol and urea, and charaterized by Fourier transform infrared spectroscopy (FT-IR). As the amount of TBPU added in polyurethane foam (PUF) was increased, the flame retardancy of PUF was increased and the mechanical properties were not decreased. Also, in the flame resistance test after the reduced pressure storage, the flame retardancy of TBPU added PUF was retained. We could find out that the thermal resistance of TBPU added PUF increased compared to that of pure PUF.