Diffusion of additives and plasticizers in poly(vinyl chloride)—I. The 1:2 double disc method for obtaining the diffusion coefficient of additives in polymers

1979 ◽  
Vol 15 (9) ◽  
pp. 817-822 ◽  
Author(s):  
G.S. Park ◽  
Tran Van Hoang
Keyword(s):  
Diffusion Coefficient ◽  
Vinyl Chloride ◽  
Poly Vinyl Chloride

scholarly journals Potentiometric Sensors for Iodide and Bromide Based on Pt(II)-Porphyrin

Sensors ◽  
2018 ◽  
Vol 18 (7) ◽  
pp. 2297 ◽  
Author(s):  
Dana Vlascici ◽  
Nicoleta Plesu ◽  
Gheorghe Fagadar-Cosma ◽  
Anca Lascu ◽  
Mihaela Petric ◽  
...  
Keyword(s):  
Diffusion Coefficient ◽  
Water Absorption ◽  
Vinyl Chloride ◽  
Potentiometric Sensors ◽  
Iodide Ions ◽  
Response Characteristics ◽  
Potentiometric Response ◽  
Poly Vinyl Chloride

Pt(II) 5,10,15,20-tetra(4-methoxy-phenyl)-porphyrin (PtTMeOPP) was used in the construction of new ion-selective sensors. The potentiometric response characteristics (slope and selectivity) of iodide and bromide-selective electrodes based on (PtTMeOPP) metalloporphyrin in o-nitrophenyloctylether (NPOE), dioctylphtalate (DOP) and dioctylsebacate (DOS) plasticized poly(vinyl chloride) membranes are compared. The best results were obtained for the membranes plasticized with DOP and NPOE. The sensors have linear responses with near-Nernstian slopes toward bromide and iodide ions and good selectivity. The membrane plasticized with NPOE was electrochemically characterized using the EIS method to determine its water absorption and the diffusion coefficient into the membrane.

Effect of Gamma Irradiation on the Migration of Di(2-Ethylhexyl) Phthalate from Plasticized Poly(Vinyl Chloride) into Air and PVC Resin

2014 ◽  
Vol 1015 ◽  
pp. 397-400
Author(s):  
Qin Wang ◽  
Wei Wu ◽  
Yan Fang Tang ◽  
Jian Jian Bian ◽  
Song Wei Zhu
Keyword(s):  
Weight Loss ◽  
Diffusion Coefficient ◽  
Gamma Radiation ◽  
Gamma Irradiation ◽  
Vinyl Chloride ◽  
Plasticized Pvc ◽  
Poly Vinyl Chloride ◽  
Ethylhexyl Phthalate

The risk of di (2-ethylhexyl) phthalate (DEHP) migration from plasticized poly (vinyl chloride) (PVC) is an important issue for patients.We present a study on the effect of gamma radiation on the migration of DEHP from plasticized PVC into air and PVC as a function of time (0-28day) at 75°C.The samples were irradiated at dose of 25 kGy using a 60Co gamma radiation source.The change of weight loss at 75°C was studied as a function of time.Diffusion coefficient of samples was calculated,it was found that the diffusion coefficient significant increased after irradiation,the sample having ESO exhibited an decrease trend of DEHP migration,which shown that ESO can effectively impress the migration of DEHP from plasticized PVC either in control or irradiate samples,the same Phenomenon was found in air and PVC.The diffusion coefficient was between 8.37×10-11 and 2.68×10-10 cm2/s in air, 8.87×10-8 and 9.99×10-8 cm2/s in PVC.

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