Startseite Naturwissenschaften Effect of the amount of oxazoline compatibilizer on the mechanical properties of liquid crystalline polymer/polypropylene blends
Artikel
Lizenziert
Nicht lizenziert Erfordert eine Authentifizierung

Effect of the amount of oxazoline compatibilizer on the mechanical properties of liquid crystalline polymer/polypropylene blends

  • Shogo Takasuka EMAIL logo und Tatsuhiro Takahashi
Veröffentlicht/Copyright: 25. Februar 2022
Veröffentlichen auch Sie bei De Gruyter Brill

Abstract

The effect of the amount of 2,2′-Bis(2-oxazoline) on the spectral, thermal, morphological, and tensile properties of polypropylene (PP)/liquid crystalline polymer (LCP)/maleic anhydride grafted PP (PP-g-MAH) blends was investigated. A wholly aromatic LCP having a low melting point, namely a AL-7000 copolyester was used, because it also uses a compatibilizer with a low decomposition temperature. As the amount of 2,2′-Bis(2-oxazoline) increased, the dispersibility of the LCP improved and the tensile properties were improved, but when it was added in excess, a loss in function was observed. In particular, when 0.5 wt% of 2,2′-Bis(2-oxazoline) were added, the tensile strength and elastic modulus were the highest, and cohesive fracture (fracture within the matrix, not at the PP/LCP interface) was observed in the scanning electron microscope image.


Corresponding author: Shogo Takasuka, Graduate School of Organic Materials Science, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan, E-mail:

  1. Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.

  2. Research funding: None declared.

  3. Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

References

Filipe, S., Cidade, M.T., and Maia, J.M. (2006a). Uniaxial extensional flow behavior of immiscible and compatibilized polypropylene/liquid crystalline polymer blends. Rheol. Acta 45: 281–289, https://doi.org/10.1007/s00397-005-0034-6.Suche in Google Scholar

Filipe, S., Cidade, M.T., Wilhelm, M., and Maia, J.M. (2004). Evolution of morphological and rheological properties along the extruder length for blends of a commercial liquid crystalline polymer and polypropylene. Polymer 45: 2367–2380, https://doi.org/10.1016/j.polymer.2003.12.080.Suche in Google Scholar

Filipe, S., Cidade, M.T., Wilhelm, M., and Maia, J.M. (2006b). Evolution of the morphological and rheological properties along the extruder length for compatibilized blends of a commercial liquid‐crystalline polymer and polypropylene. J. Appl. Polym. Sci. 99: 347–359, https://doi.org/10.1002/app.22393.Suche in Google Scholar

Incarnato, L., Scarfato, P., Motta, O., and Acierno, D. (2000). Properties of films from polypropylene and thermotropic liquid crystalline polymer blends. Polym. Compos. 21: 354–360, https://doi.org/10.1002/pc.10193.Suche in Google Scholar

Kozlowski, M. and La Mantia, F.P. (1997). Study on compatibilization of polypropylene‐liquid crystalline polymer blends. J. Appl. Polym. Sci. 66: 969–980, https://doi.org/10.1002/(SICI)1097-4628(19971031)66:5<969::AID-APP16>3.0.CO;2-I.10.1002/(SICI)1097-4628(19971031)66:5<969::AID-APP16>3.0.CO;2-ISuche in Google Scholar

Mandal, P.K. and Chakraborty, D.J. (2009). Studies on morphology, mechanical, thermal, and dynamic mechanical behavior of extrusion blended polypropylene and thermotropic liquid crystalline polymer in presence of compatibilizer. Appl. Polym. Sci. 111: 2345–2352, https://doi.org/10.1002/app.28988.Suche in Google Scholar

Mandal, P.K., Siddhanta, S.K., and Chakraborty, D. (2012). Engineering properties of compatibilized polypropylene/liquid crystalline polymer blends. J. Appl. Polym. Sci. 124: 5279–5285, https://doi.org/10.1002/app.34277.Suche in Google Scholar

Marinelli, A.L. and Bretas, R.E.S. (2003). Blends of polypropylene resins with a liquid crystalline polymer. I. Isothermal crystallization. J. Appl. Polym. Sci. 87: 916–930, https://doi.org/10.1002/app.11386.Suche in Google Scholar

Mäder, D., Kressler, G., and Mülhaupt, R. (1999). Impact‐modified poly (styrene‐co‐acrylonitrile) blends containing both oxazoline‐functionalized poly (ethene‐co‐1‐octene) elastomers and poly (styrene‐co‐maleic anhydride) as compatibilizer. J. Appl. Polym. Sci. 73: 1685–1695.10.1002/(SICI)1097-4628(19990829)73:9<1685::AID-APP9>3.0.CO;2-5Suche in Google Scholar

Minkova, L., Yordanov, H., Zamfirova, G., and Magagnini, P.L. (2002). Microhardness of compatibilized blends of polypropylene with a semiflexible liquid-crystalline polymer. Colloid Polym. Sci. 280: 358–364, https://doi.org/10.1007/s00396-001-0617-4.Suche in Google Scholar

Miteva, T. and Minkova, L. (1998). Effect of PP‐g‐LCP compatibilizer on the structure and crystallization of blends of isotactic polypropylene (PP) with a semiflexible liquid crystalline polymer (LCP). Macromol. Chem. Phys. 199: 597–606.10.1002/(SICI)1521-3935(19980401)199:4<597::AID-MACP597>3.0.CO;2-ASuche in Google Scholar

Qiu, J. (2003). Effect of the ambient temperature on the fatigue fracture properties of a polymer blend of polypropylene and liquid crystalline polyester. Kobunshi Ronbunshu 60: 225–231, https://doi.org/10.1295/koron.60.225.Suche in Google Scholar

Saengsuwan, S., Mitchell, G.R., and Bualek-Limcharoen, S. (2003). Determination of orientation parameters in drawn films of thermotropic liquid crystalline polymer/polypropylene blends using WAXS. Polymer 44: 5951–5959, https://doi.org/10.1016/S0032-3861(03)00560-3.Suche in Google Scholar

Schmidt-Naake, G., Becker, H., and Becker, W. (1999). Chemical modification of poly (styrene‐co‐acrylonitrile) with 2‐aminoalcohols and 3‐aminoalcohol. Angew. Makromol. Chem. 267: 63–66, https://doi.org/10.1002/(SICI)1522-9505(19990601)267:1<63::AID-APMC63>3.0.CO;2-E.10.1002/(SICI)1522-9505(19990601)267:1<63::AID-APMC63>3.0.CO;2-ESuche in Google Scholar

Sun, L.M., Sakamoto, T., Ueta, S., Koga, K., and Takayanagi, M. (1994). Additive effects on thermotropic liquid crystal polymer alloys II. Effects of third component of thermotropic liquid crystal polymer on mechanical properties of vectra A-reinforced poly (butylene terephthalate). Polym. J. 26: 953–960, https://doi.org/10.1295/polymj.26.953.Suche in Google Scholar

Zhang, B.Y., Sun, Q.J., Li, Q.Y., and Wang, Y. (2006). Thermal, morphological, and mechanical characteristics of polypropylene/polybutylene terephthalate blends with a liquid crystalline polymer or ionomer. J. Appl. Polym. Sci. 102: 4712–4719, https://doi.org/10.1002/app.24797.Suche in Google Scholar

Received: 2021-03-14
Accepted: 2021-07-31
Published Online: 2022-02-25
Published in Print: 2022-03-28

© 2021 Walter de Gruyter GmbH, Berlin/Boston

Heruntergeladen am 29.12.2025 von https://www.degruyterbrill.com/document/doi/10.1515/ipp-2021-4110/html
Button zum nach oben scrollen