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Silanization of di-n-octyldichlorosilane as a route to improve the integration of titanium dioxide in polypropylene

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Abstract

In this work, a di-n-alkyldichlorosilane (di-n-octyldichlorosilane) was used as an agent to improve the integration of titanium dioxide particles into isotactic polypropylene (iPP) matrix. The thermal stability of the silane coating was studied to confirm the applicability of these particles under extrusion temperature; we found by infrared spectrometry and mass spectroscopy that silanization remains stable at temperatures around 400 °C. The non-isothermal analysis of the crystallization process, conducted by differential scanning calorimetry, showed a decrement in the energetic requirements to complete the process when we used the silanized particles and filled the iPP at 0.5% in mass. Also, these silanized particles demonstrate the capability to be a selective α nucleating agent in comparison with the neat TiO2 particles that showed a slight portion of β crystals according to the wide-angle X-ray diffraction analysis.

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Acknowledgements

The authors would like to thank PRODEP for giving a scholarship to Dr. José Amir González Calderón that allowed to do this research.

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Authors and Affiliations

  1. División de Ciencias Naturales y Exactas, Campus Guanajuato Departamento de Química, Universidad de Guanajuato, 36050, Guanajuato, Guanajuato, Mexico

    José Amir Gonzalez-Calderon, Rebeca Yasmín Pérez Rodríguez & Javier Vallejo-Montesinos

  2. CONACYT-Instituto de Física, Universidad Autónoma de San Luis Potosí, Álvaro Obregón 64, 78000, San Luis Potosí, Mexico

    José Amir Gonzalez-Calderon

  3. Departamento de Ingeniería Bioquímica, Instituto Tecnológico de Celaya, Av. Tecnológico y Antonio García Cubas s/n. Celaya, 38010, Guanajuato, Mexico

    Cristina Pérez-Pérez

  4. Departamento de Ingeniería Química, Instituto Tecnológico de Celaya, Av. Tecnológico y Antonio García Cubas s/n. Celaya, 38010, Guanajuato, Mexico

    Juan Carlos Fierro-González

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  1. José Amir Gonzalez-Calderon
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  2. Cristina Pérez-Pérez
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  3. Rebeca Yasmín Pérez Rodríguez
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  4. Juan Carlos Fierro-González
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  5. Javier Vallejo-Montesinos
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Correspondence to Javier Vallejo-Montesinos.

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Gonzalez-Calderon, J.A., Pérez-Pérez, C., Pérez Rodríguez, R.Y. et al. Silanization of di-n-octyldichlorosilane as a route to improve the integration of titanium dioxide in polypropylene. J Therm Anal Calorim 138, 1069–1079 (2019). https://doi.org/10.1007/s10973-019-08159-y

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