The morphology and non-isothermal crystallization characteristics of poly(trimethylene terephthalate)/BaSO4 nanocomposites prepared by in situ polycondensation

• DOI: 10.1016/j.polymertesting.2009.02.004
• Publication Date: 2009-02-22T06:27:36Z
• Authors: Yingjin Wang; Wenya Liu; Hairong Zhang
• Keywords: Avrami equation; Isothermal process; Morphology; In situ polymerization

A simple method was developed for preparing nano-BaSO4 suspension by reacting H2SO4 with Ba(OH)2 in 1,3-propanediol (PDO). The zymotechnics and newly prepared were used fabricating PTT/BaSO4 nanocomposites situ polymerization. size distribution curves revealed that most of the particles PDO have a diameter 15–23 nm. Transmission electron microscopy (TEM) showed BaSO4 disperses uniformly PTT matrix when content no more than 12 wt%. non-isothermal crystallization behavior studied quantitatively modified Avrami equation Ozawa theory. Both theories can successfully describe pure PTT/nano-BaSO4 composites. crystallinity rate greatly increased addition BaSO4. maximum enhancement observed containing about wt% range 2–16 wt%, which confirmed both parameter (Zc) logK(T). mechanism exponents, n m nanocomposites, higher those neat PTT, suggesting complicated interaction between molecular chains nanoparticles caused changes nucleation mode crystal growth dimension. Effective activation energy calculated from Friedman formula reduced as increased, made easier to crystallize during process. polarizing micrographs much smaller or less perfect crystals formed composites due particles.