Ppp5 Development Of High Elasticity (Factors Affecting And Measurement Of Tm)
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This document discusses the physical properties of polymers, specifically their transitions between different states as temperatures change. It describes two types of transitions - first order transitions where the first derivative of Gibbs free energy is discontinuous, and second order transitions where the second derivative is discontinuous. Second order or glass transitions in polymers occur over a wide range of temperatures as the rate of molecular rotation changes to be effective on experimental timescales. The transition temperature depends on factors like the polymer's chemical structure, molecular weight, and presence of cross-linking.
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A polymer is a large molecule, or macromolecule, composed of many
repeated subunits. The structure of a polymer is defined in terms of
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For example:-
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Unit 1 thermodynamics by varun pratap singh (2020-21 Session)
Free Download Link (Copy URL):
https://sites.google.com/view/varunpratapsingh/teaching-engagements
Dear Students,
Please find the Basic Mechanical Engineering (TME-101, 2020-21 Session) Unit One notes in this section.
Topic cover in this section are:
UNIT-1: Fundamental Concepts and Definitions
Definition of thermodynamics, System, Surrounding and universe, Phase, Concept of continuum, Macroscopic & microscopic point of view. Density, Specific volume, Pressure, temperature. Thermodynamic equilibrium, Property, State, Path, Process, Cyclic and non-cyclic processes, Reversible and irreversible processes, Quasi-static process, Energy and its forms, Enthalpy.
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1. The document evaluates various physical properties of polymers including molecular weight, molecular shape, stereoregularity, branching, end-to-end distance, crystallinity, glass transition temperature, and tensile strength.
2. Several techniques for characterizing polymers are described, such as osmometry, light scattering, viscometry, and gel permeation chromatography for determining molecular weight, as well as differential scanning calorimetry and thermogravimetric analysis for analyzing thermal properties.
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Glass transition temperature
This slide is about the Glass transition temperature. This term used in Polymer Science.
Glass Transition Temperature
Chemistry
Polymer Science
Kronfeld asc2009-li
Role of αc–relaxation in high-temperature polymer deformation.
Proceedings of the American Society for Composites 2009-Twenty-Fourth Technical ConferenceWith the Canadian Association for Composite Structures and Materials (Joint Canadian-American International Conference), September 15-17, Newark, DE
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