Proving Reliability and Reproducibility of the Technology for Grafting and Crosslinking Blends Based on Ethylene Vinyl Acetate Copolymer and Triallyl Cyanurate by Electron Beam Irradiation, Using Statistical Analysis of Experimental Data Obtained

Abstract

The paper presents our experiments regarding the demonstration of reliability and reproducibility of the technology for grafting and crosslinking blends of ethylene vinyl acetate copolymer (EVA) and triallyl cyanurate polyfunctional monomer (TAC) by electron beam irradiation (EB). Blends based on EVA and TAC were irradiated with different doses of EB. The physical-mechanical properties of the irradiated samples were compared with those of samples obtained by classic crosslinking in the presence of peroxides. Experimental data obtained were processed and statistical analysis was performed using SPSS version 13 and regression models were established. Depending on the dose of irradiation, characteristics of the blends were estimated with a probability of 95% based on established regression models. The results have shown that the technology is reproducible and reliable. KEY WORDS: EVA, TAC, electron beam, physical-mechanical characteristics, regression model, estimation of variables DEMONSTRAREA FIABILITÃÞII ªI REPRODUCTIBILITÃÞII TEHNOLOGIEI DE GREFARE ªI RETICULARE A UNOR AMESTECURI PE BAZÃ DE COPOLIMER ETILENÃ-ACETAT DE VINIL ªI TRIALILCIANURAT PRIN IRADIERE CU ELECTRONI ACCELERAÞI, UTILIZÂND ANALIZA STATISTICÃ A DATELOR EXPERIMENTALE OBÞINUTE REZUMAT. Articolul prezintã experimentãrile noastre privind demonstrarea fiabilitãþii ºi reproductibilitãþii tehnologiei de grefare ºi reticulare a amestecurilor de copolimer etilenã-acetat de vinil (EVA) ºi monomer polifuncþional trialilcianurat (TAC) prin iradiere cu electroni acceleraþi (EA). Amestecurile pe bazã de EVA ºi TAC au fost iradiate cu diferite doze de EA. Caracteristicile fizico-mecanice ale probelor iradiate au fost comparate cu acelea ale probelor obþinute prin reticularea clasicã în prezenþa peroxizilor. S-a realizat procesarea ºi analiza statisticã a datelor experimentale obþinute utilizând programul SPSS versiunea 13 ºi s-au stabilit modelele de regresie. În funcþie de doza de iradiere au fost estimate caracteristicile amestecului cu o probabilitate de 95% pe baza modelelor de regresie stabilite. Rezultatele obþinute au demonstrat faptul cã tehnologia este reproductibilã ºi fiabilã. CUVINTE CHEIE: EVA, TAC, electroni acceleraþi, caracteristici fizico-mecanice, model de regresie, estimarea variabilelor.