Journal ArticleDOI
Crystallization behavior of polyphenylene sulfide in blends with a liquid crystalline polymer
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In this paper, a mixture of polyphenylene sulfide (PPS) with a commercial, wholly aromatic, liquid crystal copolyesteramide (Vectra-B950) has been prepared by meltblending.Abstract:
Blends of polyphenylene sulfide (PPS) with a commercial, wholly aromatic, liquid crystal copolyesteramide (Vectra-B950) have been prepared by meltblending. The crystallization behavior of neat and blended PPS has been studied by differential scanning calorimetry (DSC), under both non-isothermal and isothermal conditions. It has been found that blending PPS with Vectra-B leads to an increase of the temperature of non-isothermal crystallization and to a pronounced acceleration of the isothermal crystallization, without any reduction of the degree of crystallinity. All these effects have been found to occur independent of the Vectra-B concentration, within the investigated range (2 to 20%, w/w). The results have been interpreted in terms of an incrased nucleation density of the blends, probably due to heterogeneous substances, initially present in the Vectra-B bulk, which dissolve to saturation in the PPS phase, during melt-blending.read more
Citations
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Journal ArticleDOI
Non-isothermal crystallization of polymers
M. L. Di Lorenzo,Clara Silvestre +1 more
TL;DR: In this paper, the authors provide an overview of the current state-of-the-art of non-isothermal crystallization of polymers during the cooling from the melt.
Journal ArticleDOI
Structure, morphology, mechanical and thermal characteristics of the in situ composites based on liquid crystalline polymers and thermoplastics
TL;DR: In this article, a review of the fabrication, rheology, morphology, mechanical and thermal properties of in situ polymer composites is presented. But the authors focus on the processing-structure-property relationships of several in situ composites.
Journal ArticleDOI
Crystallization, Morphology, and Enzymatic Degradation of Polyhydroxybutyrate/Polycaprolactone (PHB/PCL) Blends
Deliani Lovera,Leni Marquez,Vittoria Balsamo,Antonieta Taddei,Cristina Castelli,Alejandro J. Müller +5 more
TL;DR: In this article, two types of mixtures were prepared by solution blending: high molecular weight polyhydroxybutyrate (PHB)/poly(e-caprolactone) (PCL) and PHB/low molecular weight chemically modified PCLs (mPCL).
Journal ArticleDOI
Highly efficient nucleating additive for isotactic polypropylene studied by differential scanning calorimetry
TL;DR: In this paper, the influence of an organic phosphate derivative in the crystallization of the monoclinic phase of isotactic polypropylene was studied by differential scanning calorimetry.
References
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Crystallization of polymers
TL;DR: In this article, the authors present a self-contained treatment of polymer crystallization, focusing on the thermodynamics and physical properties that accompany the morphological and structural changes that occur when a collection of molecules of very high molecular weight are transformed from one state to another.
Journal ArticleDOI
In situ composites: blends of isotropic polymers and thermotropic liquid crystalline polymers
TL;DR: In this paper, thermotropic liquid crystalline polymers (LCP) are used to improve the mechanical properties of a mixture of isotropic polymers by forming highly elongated domains parallel to the flow direction.
Journal ArticleDOI
Polymer Blends Containing Liquid Crystals: A Review
TL;DR: A review of the literature of polymer blends containing low and high molar mass liquid crystals can be found in this article, where the phase behavior, rheology, and mechanical properties of these blends are discussed.
Journal ArticleDOI
The crystallinity of poly(phenylene sulfide) and its effect on polymer properties
TL;DR: In this paper, an approximate degree of crystallinity, termed crystallinity index (Ci), could be readily assigned based on x-ray measurements, based on which a poly(phenylene sulfide) molding with very low surface crystallinity was obtained.