CAJ | 학술논문

使用大豆油经醇解、酯化和缩合反应制备了豆油基聚酯,采用红外光谱( FT-IR)、核磁共振氢谱(1 H NMR)和凝胶渗透色谱( GPC)对该豆油聚酯产品的化学结构进行了表征,将其与邻苯二甲酸二辛酯复配使用增塑聚氯乙烯( PVC),经热塑共混成型制备塑化PVC共混物,对共混物的热性能、耐迁移性能和力学性能进行了测定。研究发现：该豆油基聚酯的相对分子质量为3541、黏度2.7 Pa·s、酸值1.02 mg/g。聚酯产品可将PVC共混物的热分解温度提高到256.1℃,拉伸强度和断裂伸长率分别达到6.5 MPa和230．3%；豆油基聚酯复配DOP塑化PVC,可将增塑剂在蒸馏水、乙酸溶液、乙醇溶液、石油醚和橄榄油的迁移率分别降低到0.18%,0.22%,0.28%,0．83%和0.34%；聚酯增塑剂优异的耐迁移性能可使聚氯乙烯制品的力学性能和热性能等长期稳定,也可降低由于增塑剂迁移到人体所带来的潜在危害。
사용대두유경순해、지화화축합반응제비료두유기취지,채용홍외광보( FT-IR)、핵자공진경보(1 H NMR)화응효삼투색보( GPC)대해두유취지산품적화학결구진행료표정,장기여린분이갑산이신지복배사용증소취록을희( PVC),경열소공혼성형제비소화PVC공혼물,대공혼물적열성능、내천이성능화역학성능진행료측정。연구발현：해두유기취지적상대분자질량위3541、점도2.7 Pa·s、산치1.02 mg/g。취지산품가장PVC공혼물적열분해온도제고도256.1℃,랍신강도화단렬신장솔분별체도6.5 MPa화230．3%；두유기취지복배DOP소화PVC,가장증소제재증류수、을산용액、을순용액、석유미화감람유적천이솔분별강저도0.18%,0.22%,0.28%,0．83%화0.34%；취지증소제우이적내천이성능가사취록을희제품적역학성능화열성능등장기은정,야가강저유우증소제천이도인체소대래적잠재위해。
The soybean oil based polyester was synthesized by the polycondensation of o-phthalic anhydride and the soybean oil monoglyceride obtained from the transesterification of soybean oil and glycerol at 230 -240 ℃. The soybean oil polyester was characterized by gel permeation chromatography ( GPC) and FT-IR. And the synthesized soybean oil polyester was then blend with polyvinyl chloride ( PVC ) to form a plasticized PVC. Thermodynamic properties, plasticizer migration stability and mechanical properties of soybean oil polyester plasticized PVC were investigated. The results showed that relative molecular mass of the polyester was 3 541. The thermal degradation temperature of the plasticized PVC was 256. 1 ℃. And tensile strength and elongation at break for this plasticized PVC could reach 6. 5 MPa and 230. 3%, respectively. In addition, the combination of soybean oil polyester and dioctyl phthalate ( DOP ) using as complex plasticizer to plasticize PVC was also evaluated. The migration ratio of these complex plasticizers in distilled water, acetic acid solution, ethanol solution, petroleum ether and olive oil reduced to 0. 18%,0. 22%,0. 28%,0. 83% and 0. 34%, which was indicative of their excellent migration property. Herein, the thermal and mechanical properties of the soybean oil polyester plasticized PVC could maintain for long time and the potential harm to human caused by plasticizer could be reduced at same time.