Polymer processing condition

Polymer Crystallization Under High Cooling Rate and Pressure A Step Towards Polymer Processing Conditions... 

A. Sorrentino et al. Polymer Crystallization Under High Cooling Rate and Pressure A Step Towards Polymer Processing Conditions, Lect. Notes Phys. 714, 329-344 (2007)... 

Multilamellar Crystals, Hedrites, and Spherulites. Upon crystallization from the quiescent melt (or concentrated solution), polymers exhibit higher order supramolecular structures, including stacks of lamellae, hedrites, and finally spherulites (167). Hedrites (177) are entities composed of multiple lamellar crystals and as such correspond to intermediate stages of spherulitic growth. SFM in various modes was used to determine spherulite sizes and details of lamellar arrangement within spherulites for a wide variety of polymers and polymer processing conditions. SFM data acquired at free surfaces, at the surface of microtomed... 

Olefin metathesis has evolved into an important synthetic tool in organic and polymer chemistiy. The family of ruthenium (Ru)-based catalysts (e.g. 1, n, or in. Figure 1), tolerant of normal oiganic and polymer-processing conditions and preserving their catalytic properties in the presence of the majority of functional groups has allowed a great number of new applications [1]. 

Somani RH, Yang L, Zhu L, Hsiao BS (2005) Flow-induced shish-kebab precursor structures in entangled polymer melts. Polymer 46 8587-8623 Sorrentino A, De Santis F, Titomanlio G (2007) Polymer crystallization under high cooling rate and pressure a step towards polymer processing conditions. Lect Notes Phys 714 329-344 Stocker W, Magonov SN, Cantow HI, Wittmann JC, Lotz B (1993) Contact faces of epitaxially crystallized a- and y-phase isotactic polypropylene observed by atomic force microscopy. Macromolecules 26 5915-5923... 

Lack of robust commercial sensors for polymer processing conditions... 

All components of a formulation, i.e., even pigments integrated in a polymer, can influence shrinkage in finished parts. The degree to which shrinkage is influenced depends on the type of polymer, processing conditions, and the pigment and its... 

The study of crystallization of polymers is generally conducted in isothermal conditions, since the use of a constant temperature permits an easier theoretical treatment and Kmits the problems connected with thermal gradients within the samples. Nevertheless, the analysis of nonisothermal crystaUization is also of great importance, since it permits us to better simulate the polymer processing conditions. 

Polymer processing conditions are sometimes called the processing history of a polymer, which is very important in understanding photodegradation mechanisms. 

Sorrentino, A., De Santis, E, Titomanlio, G. Polymer crystaUization under high cooling rate and pressure A step towards polymer processing conditions. In Lecture Notes in Physics Progress in Understanding of Polymer Crystallization, Reiter, G., Strobl, G. (eds.). Springer, Berlin, 2007, vol. 714, Chapter 16, pp 329-344. 

Polymer processing conditions and techniques including polymerisation, heat treatment, shape forming, and sterilisation. 

A relevant question at this point is Can we take advantage of chaos in typical polymer processing conditions The... 

Unless it can be properly crystallized, the field of applications for poly(lactic acid) will be limited by its low glass transition temperature. This paper discusses different strategies that can lead to partial crystallization within typical polymer processing conditions. X-ray techniques and DSC analysis are used to access the crystalline content developed in various molding and extrusion conditions and as a function of plasticizer and nucleating agent content. 

Materials used in the studies discussed were commercial resins used without modification. Details of formulation preparations, polymer processing conditions and testing are presented in Appendix 1. 

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