Crystallization kinetics and melting behavior of nylon 10,10 in nylon 10,10–montmorillonite nanocomposites

Abstract

ABSTRACT:The crystallization kinetics and melting behavior of nylon 10,10 in neat nylon 10,10 and in nylon 10,10 -montmorillonite (MMT) nanocomposites were systematically investigated by differential scanning calorimetry. The crystallization kinetics results show that the addition of MMT facilitated the crystallization of nylon 10,10 as a heterophase nucleating agent; however, when the content of MMT was high, the physical hindrance of MMT layers to the motion of nylon 10,10 chains retarded the crystallization of nylon 10,10, which was also confirmed by polarized optical microscopy. However, both nylon 10,10 and nylon 10,10 -MMT nanocomposites exhibited multiple melting behavior under isothermal and nonisothermal crystallization conditions. The temperature of the lower melting peak (peak I) was independent of MMT content and almost remained constant; however, the temperature of the highest melting peak (peak II) decreased with increasing MMT content due to the physical hindrance of MMT layers to the motion of nylon 10,10 chains.

Morphology and Properties of Poly(L‐Lactide) (PLLA) Filled with Hollow Glass Beads

“…The investigation of PLLA/organoclay composites exhibited a similar lower cold crystallization temperature phenomenon compared to that of pure PLLA. [18] Zhang et al [18] attributed this to the nucleating effect of well-dispersed organoclay layers. Therefore, HGBs are expected to act as efficient nucleating agents.…”

Development of polylactic acid nanocomposite films reinforced with cellulose nanocrystals derived from coffee silverskin

“…Sanchez-Garcia et al (2008) also mentioned the transcrystallinity effect, whereby the fibers can cause crystal nucleation of the biopolymers. Also, in previous study (Zhang & Yan, 2003), they added cellulose nanowhiskers (CNW) as a reinforcing element to PLA nanocomposites. They revealed that the crystallinity increased with the addition of CNW could be explained by the fiber-induced crystallization of the biopolymers.…”

On the use of plant cellulose nanowhiskers to enhance the barrier properties of polylactic acid

“…This behaviour is in contrast to the work by Peterson but agrees with a previous work in PHBV (Jiang et al 2008). The crystallinity increase with the addition of CNW has been explained by the assumption that the CNW act as efficient nucleating agents, which enhance the crystallization rate of the matrix molecules (Zhang and Yan 2003). In principle, fillerinduced crystallization of the biopolymers, particularly transcrystallinity that blocks the filler matrix interface, is positive from a barrier perspective, since crystals are typically impermeable systems.…”