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Modification of the reactive core-shell particles properties to prepare PBT/PC blends with higher toughness and stiffness

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Abstract

Glycidyl methacrylate (GMA) functionalized methyl methacrylate-butadiene-styrene core-shell particles (PB-g-MSG) were prepared to toughen poly (butylene terephthalate) (PBT) and polycarbonate (PC) blends. T-dodecyl mercaptan (TDDM) was used to modify the grafting character of the core-shell particles. The addition of TDDM decreased the grafting degree, particles size and crosslinking degree of PB-g-MSG particles. At the same time, the free methyl methacrylate-co-styrene-co-glyceryl methacrylate copolymer (f-MSG) increased. The f-MSG reacted with PBT and suppressed the transesterification between PBT and PC. On the other hand, f-MSG promoted the crystallization of PBT by heterogeneous nucleation. When the TDDM content was lower than 0.76%, PB-g-MSG particles dispersed in the matrix uniformly, otherwise, agglomeration took place. The change of TDDM content in the PB-g-MSG particles influenced the toughening ability and tensile properties. When the TDDM content was 0.76%, the PBT/PC/PB-g-MSG blend showed the optimum impact toughness and yield strength, which are 908 J/m and 49.4Mpa. Fracture mechanism results indicated that cavitation induced shear yielding occurred in the PBT/PC/PB-g-MSG blend when no TDDM addition for the core-shell particles. With the addition of TDDM, the interfacial strength decreased between the PB-g-MSG core-shell particles and the matrix. So voids appeared due to debonding, which also could promote the shear yielding process.

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Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (51273025, 51272026, and 50803007) and Jilin Provincial Science & Technology Department (20140101104JC).

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Authors and Affiliations

  1. Engineering Research Center of Synthetic Resin and Special Fiber, Ministry of Education, Changchun University of Technology, Changchun, 130012, China

    Bin Deng, Hanxiao Lv, Shixin Song, Shulin Sun & Huixuan Zhang

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  1. Bin Deng
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  2. Hanxiao Lv
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  3. Shixin Song
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  4. Shulin Sun
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  5. Huixuan Zhang
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Correspondence to Shulin Sun.

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Deng, B., Lv, H., Song, S. et al. Modification of the reactive core-shell particles properties to prepare PBT/PC blends with higher toughness and stiffness. J Polym Res 24, 85 (2017). https://doi.org/10.1007/s10965-017-1250-3

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  • DOI: https://doi.org/10.1007/s10965-017-1250-3

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