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How the Crosslinking Agent Influences the Thermal Stability of RTV Phenyl Silicone Rubber

In this work, a thermal degradation mechanism of room temperature vulcanized (RTV) phenyl silicone rubber that was vulcanized by different crosslinking agents was discussed. Firstly, RTV phenyl silicone rubber samples were prepared by curing hydroxyl-terminated polymethyldiphenylsiloxane via three c...

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Detalles Bibliográficos
Autores principales: He, Chen, Li, Boqian, Ren, Ying, Lu, Wu, Zeng, Yibing, He, Weidong, Feng, Anchao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6337489/
https://www.ncbi.nlm.nih.gov/pubmed/30591686
http://dx.doi.org/10.3390/ma12010088
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author He, Chen
Li, Boqian
Ren, Ying
Lu, Wu
Zeng, Yibing
He, Weidong
Feng, Anchao
author_facet He, Chen
Li, Boqian
Ren, Ying
Lu, Wu
Zeng, Yibing
He, Weidong
Feng, Anchao
author_sort He, Chen
collection PubMed
description In this work, a thermal degradation mechanism of room temperature vulcanized (RTV) phenyl silicone rubber that was vulcanized by different crosslinking agents was discussed. Firstly, RTV phenyl silicone rubber samples were prepared by curing hydroxyl-terminated polymethyldiphenylsiloxane via three crosslinking agents, namely, tetraethoxysilane (TEOS), tetrapropoxysilane (TPOS), and polysilazane. Secondly, the ablation properties of RTV phenyl silicone rubber were studied by the muffle roaster test and FT-IR. Thirdly, thermal stability of the three samples was studied by thermogravimetric (TG) analysis. Finally, to explore the thermal degradation mechanism, the RTV phenyl silicone rubber vulcanized by different crosslinking agents were characterized by TG analysis-mass spectrum (TG-MS) and pyrolysis gas chromatogram-mass spectrum (pyGC-MS). Results showed that the thermal stability of RTV phenyl silicone rubber is related to the amount of residual Si–OH groups. The residual Si–OH groups initiated the polysiloxane chain degradation via an ‘unzipping’ mechanism.
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spelling pubmed-63374892019-01-22 How the Crosslinking Agent Influences the Thermal Stability of RTV Phenyl Silicone Rubber He, Chen Li, Boqian Ren, Ying Lu, Wu Zeng, Yibing He, Weidong Feng, Anchao Materials (Basel) Article In this work, a thermal degradation mechanism of room temperature vulcanized (RTV) phenyl silicone rubber that was vulcanized by different crosslinking agents was discussed. Firstly, RTV phenyl silicone rubber samples were prepared by curing hydroxyl-terminated polymethyldiphenylsiloxane via three crosslinking agents, namely, tetraethoxysilane (TEOS), tetrapropoxysilane (TPOS), and polysilazane. Secondly, the ablation properties of RTV phenyl silicone rubber were studied by the muffle roaster test and FT-IR. Thirdly, thermal stability of the three samples was studied by thermogravimetric (TG) analysis. Finally, to explore the thermal degradation mechanism, the RTV phenyl silicone rubber vulcanized by different crosslinking agents were characterized by TG analysis-mass spectrum (TG-MS) and pyrolysis gas chromatogram-mass spectrum (pyGC-MS). Results showed that the thermal stability of RTV phenyl silicone rubber is related to the amount of residual Si–OH groups. The residual Si–OH groups initiated the polysiloxane chain degradation via an ‘unzipping’ mechanism. MDPI 2018-12-27 /pmc/articles/PMC6337489/ /pubmed/30591686 http://dx.doi.org/10.3390/ma12010088 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
He, Chen
Li, Boqian
Ren, Ying
Lu, Wu
Zeng, Yibing
He, Weidong
Feng, Anchao
How the Crosslinking Agent Influences the Thermal Stability of RTV Phenyl Silicone Rubber
title How the Crosslinking Agent Influences the Thermal Stability of RTV Phenyl Silicone Rubber
title_full How the Crosslinking Agent Influences the Thermal Stability of RTV Phenyl Silicone Rubber
title_fullStr How the Crosslinking Agent Influences the Thermal Stability of RTV Phenyl Silicone Rubber
title_full_unstemmed How the Crosslinking Agent Influences the Thermal Stability of RTV Phenyl Silicone Rubber
title_short How the Crosslinking Agent Influences the Thermal Stability of RTV Phenyl Silicone Rubber
title_sort how the crosslinking agent influences the thermal stability of rtv phenyl silicone rubber
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6337489/
https://www.ncbi.nlm.nih.gov/pubmed/30591686
http://dx.doi.org/10.3390/ma12010088
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