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14-07-2020 | Original Paper

Effect of vulcanization systems on the properties of natural rubber latex films

Authors: Daniele Rosendo de Lima, Elisson Brum Dutra da Rocha, Ana Maria Furtado de Sousa, Antonio Carlos Augusto da Costa, Cristina Russi Guimarães Furtado

Published in: Polymer Bulletin | Issue 7/2021

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Abstract

Natural rubber latex (NRL) films have high elasticity and flexibility and are excellent protection barriers against micro-organisms. For this reason, NRL is often used in the manufacture of medical products, such as gloves, condoms, blood transfusion tubes and catheters. The objective of this study was to evaluate the effect of two accelerators, ZDEC and TMTD, of the sulphur-based curing system, on the rheometric, crosslink density, thermal and mechanical properties. For this purpose, the compositions of NRL films were designed using two-level factorial design with a centre point, considering the variation from − 1 to + 1 of the levels of sulphur and accelerators. The results indicated that the delta torque was influenced by the addition of sulphur only. Scorch time (Ts1) and optimum vulcanization time (T90) decreased as TMTD was added to the formulations. TMTD only contributed to the crosslink density when low amounts of sulphur were used. Higher values of tensile strength were observed for sulphur, ZDEC and TMTD amounts, but it was close to the centre point experiments. SEV and EV vulcanization systems did not necessarily produce crosslinks that require higher energy to brake when compared to CONV system.

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Title: Effect of vulcanization systems on the properties of natural rubber latex films
Authors: Daniele Rosendo de Lima
Elisson Brum Dutra da Rocha
Ana Maria Furtado de Sousa
Antonio Carlos Augusto da Costa
Cristina Russi Guimarães Furtado
Publication date: 14-07-2020
Publisher: Springer Berlin Heidelberg
Published in: Polymer Bulletin / Issue 7/2021
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI: https://doi.org/10.1007/s00289-020-03291-4

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