Effect of uniaxial drawing on the structure and glass transition behavior of poly(trimethylene 2,6-naphthalate)/layered clay nanocomposites

Khan, Ahmad Nawaz; Hong, Po‐Da; Chuang, Wei‐Tsung; Shih, Kan-Shan

doi:10.1016/j.polymer.2009.10.056

Cited by 25 publications

(11 citation statements)

References 65 publications

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“…It leads a less constrained amorphous phase with higher cooperative rearranging regions (CRR) size in the model introduced by Adam and Gibbs [38] and adapted by Donth [39,40]. The decrease of CRR [41][42][43] size with the decrease of the amorphous phase content report in this study is analogous with previously published data on the evolution of the CRR in ceramic/ polymer nanocomposites [44,45]: the densification of the composite with the increase of the inorganic phase volume fraction tends to reduce the activation enthalpy of the α process and consequently the size of the CRR.…”

Section: α Relaxation Modesupporting

confidence: 86%

Molecular mobility interpretation of the dielectric relaxor behavior in fluorinated copolymers and terpolymers

Capsal

Dantras

Lacabanne

2013

Journal of Non-Crystalline Solids

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International audienceThermo Stimulated Current and Dynamic Dielectric Spectroscopy have been applied to investigate dielectric relaxation modes of poly(vinylidene-fluoride trifluoroethylene) copolymer and poly(vinylidene-fluoridetrifluoroethylene-chlorofluoroethylene) terpolymer. The aim of this work is to check the molecular origin of the ferroelectric relaxor behavior of the terpolymer. The combination of data obtained by both dielectricmethods allows us to describe themolecular mobility of the amorphous phase and the cooperativity of the order/disorder dipolar transition in the crystalline phase. The introduction of 1,1-chlorofluoroethylene units in the main chain induces an increase of the Cooperative Rearranging Region size associatedwith less ordered and smaller crystallites. This morphological evolution is responsible of a lack of cooperativity and it explains the dielectric relaxor behavior of the poly(vinylidene-fluoride-trifluoroethylene-chloroethylene) terpolymer

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Section: α Relaxation Modesupporting

confidence: 86%

Molecular mobility interpretation of the dielectric relaxor behavior in fluorinated copolymers and terpolymers

Capsal

Dantras

Lacabanne

2013

Journal of Non-Crystalline Solids

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“…Except for the 97/3 nanocomposite with TEC as the plasticizer, the addition of organoclay changes the T g to higher values when compared with the plasticized CA (Table II). The shift of T g is strongly dependent on interface morphology, interparticle spacing, and polymer–nanoparticle interactions 44. On the other hand, complex relaxation dynamics in the polymer/layered clay nanocomposites relative to the nanoparticles can be expected due to the geometrical constraint imposed by the two‐dimensional space of the intercalated and exfoliated structures.…”

Section: Resultsmentioning

confidence: 99%

Morphology and mechanical properties of nanocomposites of cellulose acetate and organic montmorillonite prepared with different plasticizers

Lima

Pinotti

Felisberti

et al. 2011

J of Applied Polymer Sci

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Nanocomposites of cellulose acetate and an organically modified montmorillonite (CA/MMTO) were prepared by melt intercalation in a twin‐screw extruder, using two different plasticizers: di‐octyl phthalate (DOP) and triethyl citrate (TEC). The influence of plasticizer type and the organoclay added to the structure, the morphology, and the thermal properties of the nanocomposites was investigated. XRD and SAXS results indicated a significant CA or/and plasticizer intercalation in the clay gallery for the CA/MMTO nanocomposites. In addition, the images obtained by TEM show that the morphology of CA/MMTO nanocomposites is made up of intercalated and exfoliated silicate layers. The glass transition temperature (Tg) of CA with DOP or TEC decreased in at almost same value, which shows the characteristics of both additives as plasticizers for cellulose acetate chains. Tensile tests indicate that the nanocomposites with either of the two plasticizers presented the same performance with respect to material properties. The results demonstrated that, for some applications, TEC is an useful alternative to plasticize CA in order to substitute DOP, a non eco‐friendly plasticizer. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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“…Decrease of the CRR size upon the introduction of submicronic particles has been exhibited on the same samples, by thermostimulated currents [30]. Many authors have reports the influence of the fillers [31] content or crystallinity [32,33] of the samples on the CRR size. In both cases, an increase of non amorphous phase content (inorganic fillers or crystal phase) leads to a decrease of the CRR sizes associated with an increase of the heterogeneity in the amorphous phase of the polymer.…”

Section: Viscoelasticitymentioning

confidence: 89%

Dynamic mechanical behaviour of polyamide 11/Barium titanate ferroelectric composites

Capsal

Pousserot

Dantras

et al. 2010

Polymer

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Effect of uniaxial drawing on the structure and glass transition behavior of poly(trimethylene 2,6-naphthalate)/layered clay nanocomposites

Cited by 25 publications

References 65 publications

Molecular mobility interpretation of the dielectric relaxor behavior in fluorinated copolymers and terpolymers

Molecular mobility interpretation of the dielectric relaxor behavior in fluorinated copolymers and terpolymers

Morphology and mechanical properties of nanocomposites of cellulose acetate and organic montmorillonite prepared with different plasticizers

Dynamic mechanical behaviour of polyamide 11/Barium titanate ferroelectric composites

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