Authors:O. Grigoryeva, A. Fainleib, A. Tolstov, P. Pissis, A. Spanoudaki, A. Vatalis, and C. Delides
and phase structure of thermoplastic elastomers (TPEs) based on post-consumer
materials such as recycled lowor high-density polyethylene and ground tyre
rubber (GTR) were investigated by using TG, DSC and DMTA analysis. Preliminary
reclamation of GTR leads to enhancement of compatibility between polyethylene
matrix and dispersed GTR particles.
The thermal behavior of chitosan (CS)/natural rubber latex (NRL) blends has been studied by thermogravimetry (TG) and differential
scanning calorimetry (DSC). Decomposition behavior of CS changes with the addition of NRL. The effect of blend composition
on the amount of residue remaining at various temperatures has been studied. Activation energies of degradation have been
calculated using Horowitz-Metzger equation. From the activation energy values, it is found that among the series of the blend
compositions, CS15NRL85 exhibits better thermal stability. DSC studies reveals that the CS/NRL blends are thermodynamically incompatible. This is
evident from the presence of two glass transitions, corresponding to CS and NRL phases in the blend.
for elastomer-based polymer composites.
In this study, the polymer composites of LCP-, clay- and CNT-filled styrenic-based thermoplasticelastomer were prepared. Thermal decomposition behavior and kinetics of thermal decomposition for the
series of multiblock copolymers, poly(ester-block-amide)s
(PEA) and poly(amide-block-amide)s (PAA),
with the same type of oligoamide soft block were obtained. Oligoamide soft
block was prepared from dimerized fatty acid and 1,6-hexamethylenediamine.
Oligo(butylene terephthalate) (PBT) was used as oligoester hard block in the
first series and oligolaurolactam (PA12) was oligoamide hard block in the
second one. The thermal and mechanical properties of these copolymers have
been investigated as functions of temperature and the hard/soft block ratio.
DSC and DMTA revealed that the copolymers behaved as thermoplastic elastomers.
The static loading-induced stress oscillation (SO) in syndiotactic polypropylene (sPP) was studied by modulated differential scanning calorimetry (TMDSC). Samples were taken from the initial necked, premature and mature SO oscillation ranges, respectively, and the related calorimetric responses were compared to those of the bulk material. It was established that necking caused some decrease in the crystallinity. In addition, necking resulted in cold crystallization that was assigned to a polymorphic transition (from all-trans to helical conformation) based on literature results. The TMDSC response was practically the same for necked samples with and without SO. A model was proposed to explain SO. The model assumes the presence of a network (similar to that of semicrystalline thermoplastic elastomers), which is highly stretchable and fails by sudden voiding at the intersections of shear micro bands intermittently.
Authors:G. Janowska, A. Kucharska, W. M. Rzymski, and A. Kasiczak
Grigoryeva , O , Fainleib , A , Tolstov , A , Pissis , P , Spanoudaki , A , Vatalis , A , Delides , C . Thermal analysis of thermoplasticelastomers based on recycled polyethylenes and ground tyre rubber . J Therm Anal Calorim 2006 86 : 229
Authors:K. Agarwal, M. Prasad, A. Chakraborty, C. B. Vishwakarma, R. B. Sharma, and D. K. Setua
Setua , DK , Soman , C , Bhowmick , AK , Mathur , GN 2002 Oil resistant thermoplasticelastomers of nitrile rubber and high density polyethylene blend . Polym Eng Sci 42 1 10 – 18 10.1002/pen.10924