Partial alignment of polymer molecular chains, resulting in "semi-crystalline" structures
Crystallization of polymers is a process associated with partial alignment of their molecular chains. These chains fold together and form ordered regions called lamellae, which compose larger spheroidal structures named spherulites.[1][2] Polymers can crystallize upon cooling from melting, mechanical stretching or solvent evaporation. Crystallization affects optical, mechanical, thermal and chemical properties of the polymer. The degree of crystallinity is estimated by different analytical methods and it typically ranges between 10 and 80%, with crystallized polymers often called "semi-crystalline". The properties of semi-crystalline polymers are determined not only by the degree of crystallinity, but also by the size and orientation of the molecular chains.
named spherulites. Polymers can crystallize upon cooling from melting, mechanical stretching or solvent evaporation. Crystallization affects optical, mechanical...
Crystallizationofpolymers Some polymers that strain crystallize Polyethylene Polyethylene Terephthalate Some elastomers that strain crystallize Natural...
Semi-crystalline polymers can undergo crystallization and melting transitions, whereas amorphous polymers do not. In polymers, crystallization and melting...
80s that attempts to describe the crystallizationof a polymer in terms of the kinetics and thermodynamics ofpolymer surface nucleation. The theory introduces...
water(s) ofcrystallization or water(s) of hydration are water molecules that are present inside crystals. Water is often incorporated in the formation of crystals...
Crystallization in its turn affects the optical properties of the polymers, its optical band gap and electronic levels. Common synthetic polymers have...
weight of the polymer and thermal history.[citation needed] The percent crystalline content of a polymer can be estimated from the crystallization/melting...
Coordination polymers are relevant to many fields, having many potential applications. Coordination polymers can be classified in a number of ways according...
"Stereocontrol of diene polymers by topochemical polymerizationof substituted benzyl muconates and their crystallization properties". Journal ofPolymer Science...
Protein crystallization is the process of formation of a regular array of individual protein molecules stabilized by crystal contacts. If the crystal...
"Relationship between the Stereocomplex Crystallization Behavior and Mechanical Properties of PLLA/PDLA Blends". Polymers. 13 (11): 1851. doi:10.3390/polym13111851...
transitions. Fragility Archived 2007-06-28 at the Wayback Machine VFT Eqn. Polymers I Polymers II Archived 2010-01-11 at the Wayback Machine Angell: Aqueous media...
Plastics are a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. Their plasticity makes it possible for plastics...
classified by bulk polymers, voided charged polymers ("piezoelectrets"), and polymer composites. A piezo-response observed by bulk polymers is mostly due to...
natural polymers such as starch and are recently being more widely investigated due to discharge requirements. Polymer-based AS are synthetic polymers that...
polymers, it has better barrier properties than aliphatic polymers. It is strong and impact-resistant. PET is hygroscopic. About 60% crystallization is...
electrolytic capacitors, including polymer tantalum, have a unique failure mode called "field crystallization". Field crystallization is the major reason for degradation...
shift to implementing polymeric materials, a greater understanding of failure mechanisms for these polymers is needed . Polymers may exhibit some inherently...
connected together. Knotted polymers consist of multiple intramolecular cyclization units within a single polymer chain. Linear polymers may also fold into topological...
usually prevent complete crystallization—and sometimes polymers are completely amorphous. A quasicrystal consists of arrays of atoms that are ordered but...
officer in the Polymers Division, where he was given the task of working out how the physical structure ofpolymers affects crystallization. In 1955, he...
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