Effects of UV Exposure on Poly (hydroxy urethane) -Poly (vinyl alcohol) (PHU-PVA) Blends for Polymer Membranes

被引:0
作者
Nechifor, Cristina-Delia [1 ,2 ]
Dorohoi, Dana-Ortansa [1 ]
Ciobanu, Constantin [3 ]
机构
[1] Alexandru Ioan Cuza Univ, Fac Phys, Iasi 700506, Romania
[2] Gheorghe Asachi Tech Univ Iasi, Iasi 700050, Romania
[3] Petru Poni Inst Macromol Chem, Iasi 700081, Romania
关键词
UV treatment; photo oxidation; photo degradation; photo stabilization resilience; POSITRON-ANNIHILATION SPECTROSCOPY; FILMS; IRRADIATION; PHOTODEGRADATION; POLYURETHANE; DEGRADATION; RADIATION; NETWORKS;
D O I
暂无
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The effects of UV exposure on physico-chemical properties of polymer membranes were studied in this paper. The membranes having different surface energy, resilience and initial modulus of elasticity were obtained from a series of blends of poly (hydroxy-urethane) and poly (vinyl alcohol). UV treatments in air, at room temperature, decrease the water contact angles as a result of higher surface energies of the polymer membranes. Some important modifications appear in ATR-FTIR spectra. The mechanical properties of the untreated polymer films are better than of the UV treated samples. Short-term UV irradiations lead to a photo stabilization effect of polymer surface. Bulk chemical changes are induced through photo oxidation and photo degradation processes for long-term UV irradiation.
引用
收藏
页码:306 / 310
页数:5
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