Non-Isothermal Crystallization Kinetics of Polyamide 6/h-Boron Nitride Composites

ABSTRACT Hexagonal boron nitride nanosheets were mixed with polyamide 6 to fabricate polymer-based composites by using a solution blending method. The nonisothermal crystallization behaviors of the as-prepared composites were investigated via differential scanning calorimetry. Results showed that the peak temperature of the exothermic crystallization curve was moved to lower temperature with increase in the cooling rate. At the same cooling rate, the peak temperature of the pure polyamide 6 was lower than those of the composites. Moreover, the crystallization rate increased gradually with increase in the cooling rate. In addition, at the cooling rates of 5 or 10°C min−1, the crystallization rate of pure polyamide 6 was higher than those of all compositions of the composites. However, at the cooling rates of 20 or 40°C min−1, the crystallization rate decreased first and then increased with increase in the fillers loading. The crystallization mechanism was between one-dimensional and two-dimensional during the crystallization process.

[1]  Wenhui Xu,et al.  Polyamide 6/modified Carbon Black Nanocomposites Prepared via In Situ Polymerization , 2015 .

[2]  M. Barczewski,et al.  Nonisothermal crystallization of highly‐filled polyolefin/calcium carbonate composites , 2014 .

[3]  Dimitri Bakirtzis,et al.  Polyamide 6/Graphene Composites: The Effect of in situ Polymerisation on the Structure and Properties of Graphene Oxide and Reduced Graphene Oxide , 2014 .

[4]  Xue Yanming,et al.  Large-scale synthesis of hexagonal boron nitride nanosheets and their improvement in thermal properties of epoxy composites , 2014 .

[5]  N. Xu,et al.  Biomass-directed synthesis of 20 g high-quality boron nitride nanosheets for thermoconductive polymeric composites. , 2014, ACS nano.

[6]  G. Wen,et al.  A facile route to high-purity BN nanoplates with ultraviolet cathodoluminescence emissions at room temperature , 2014 .

[7]  Jia‐Zhuang Xu,et al.  Poly(L-lactic acid) crystallization in a confined space containing graphene oxide nanosheets. , 2013, The journal of physical chemistry. B.

[8]  J. Connell,et al.  Advances in 2D boron nitride nanostructures: nanosheets, nanoribbons, nanomeshes, and hybrids with graphene. , 2012, Nanoscale.

[9]  G. Zhong,et al.  Graphene Oxide Nanosheet Induced Intrachain Conformational Ordering in a Semicrystalline Polymer. , 2012, The journal of physical chemistry letters.

[10]  Fan Zhang,et al.  Nonisothermal crystallization kinetics of in situ nylon 6/graphene composites by differential scanning calorimetry , 2011 .

[11]  Wanlin Guo,et al.  "White graphenes": boron nitride nanoribbons via boron nitride nanotube unwrapping. , 2010, Nano letters.

[12]  Yan Liu,et al.  Non-isothermal crystallization kinetics of polyamide-6/graphite oxide nanocomposites , 2010 .

[13]  Z. Ping,et al.  Preparation and rheological behaviors of PA6/SiO2 nanocompiste , 2007 .

[14]  G. Seifert,et al.  Dimensionally, morphologically, and thermally induced phase transformations in boron-nitrogen nanowires , 2007 .

[15]  Xueping Gao,et al.  Comparative study of hydrogen adsorption on carbon and BN nanotubes. , 2006, The journal of physical chemistry. B.

[16]  C. Han,et al.  Synthesis and characterization of multi-walled carbon nanotubes reinforced polyamide 6 via in situ polymerization , 2005 .

[17]  Wanxi Zhang,et al.  Mechanical properties, crystallization and melting behaviors of carbon fiber-reinforced PA6 composites , 2013, Journal of Thermal Analysis and Calorimetry.

[18]  Gang Wang,et al.  Isothermal and nonisothermal crystallization kinetics of elastomeric polypropylene , 2002 .