Depletion-Induced Nonbirefringent Banding in Thin Isotactic Polystyrene Thin Films

Duan, Yongxin; Jiang, Yong; Jiang, Shidong; Li, Lin; Yan, Shouke; Schultz, J. M.

doi:10.1021/ma0483165

Cited by 94 publications

(94 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Although this seldom happened, the non-traditional concentric-ringed morphology with a rhythmic change of radial thickness stemming from a discrete packing of radial lamellae can be occasionally observed in 2D spherulites when polymers crystalized from thin films. Typical examples are the observations of non-birefringent concentric ringed crystals in both iPS and poly(bisphenol A hexane ether) (BA-C6) thin films [31][32][33]. The morphological features and lamellar organizations of the case of iPS are displayed in Figure 3b [33].…”

Section: Manipulating the Stacking Of Radial Lamellae To Prepare Concmentioning

confidence: 96%

“…Typical examples are the observations of non-birefringent concentric ringed crystals in both iPS and poly(bisphenol A hexane ether) (BA-C6) thin films [31][32][33]. The morphological features and lamellar organizations of the case of iPS are displayed in Figure 3b [33]. It is illustrated that such periodically spherulitic structures derive from a rhythmic crystallization-induced discrete packing of multilayer flat-on lamellae, and which can merely be formed under limited thicknesses and temperature ranges.…”

Section: Manipulating the Stacking Of Radial Lamellae To Prepare Concmentioning

confidence: 98%

“…In the latter case, one can now be named as non-classically concentric ringed spherulites, the concentric rings often possess a clearer contrast in non-polarized light and exhibit a rhythmic variation of the radial thickness [31][32][33]. Figure 3 give the typical examples to display the optical features and corresponding radial lamellar organizations of the two different types of polymer ring-banded morphologies, where Figure 3a,b are the CEBS of poly(trimethylene terephthalate) (PTT) and the non-birefringent concentric-ringed spherulites (ZBCRS) of isotactic polystyrene (iPS), respectively [33,34]. It should be noted that some extinction banded spherulites of polymer blends also possess an origin of the structural discontinuity deriving from an alternative stacking of lamellar crystals and the blended amorphous materials [35][36][37].…”

Section: Introductionmentioning

confidence: 99%

“…In the former situation, so-called classical extinction-banded spherulites (CEBS), the extinction bands are widely observed under polarized light, but are poorly discernible in unpolarized light [8]. In the latter case, one can now be named as non-classically concentric ringed spherulites, the concentric rings often possess a clearer contrast in non-polarized light and exhibit a rhythmic variation of the radial thickness [31][32][33]. Figure 3 give the typical examples to display the optical features and corresponding radial lamellar organizations of the two different types of polymer ring-banded morphologies, where Figure 3a,b are the CEBS of poly(trimethylene terephthalate) (PTT) and the non-birefringent concentric-ringed spherulites (ZBCRS) of isotactic polystyrene (iPS), respectively [33,34].…”

Section: Introductionmentioning

confidence: 99%

“…(a) Polarized optical microscopy (POM) and scatting electron microscopy (SEM) and (b) optical microscopy (OM) and atomic force microscopy (AFM) phase images exhibiting the representative features and lamellar organizations for the two kinds of ring-banded patterns in 2D polymer spherulites having the origins of (a) periodic twisting and (b) discrete packing of radial lamellae. Reprinted with permission from [33,34]. Copyright (2011) and (2004) American Chemical Society.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Morphological Control of Polymer Spherulites via Manipulating Radial Lamellar Organization upon Evaporative Crystallization: A Mini Review

Wang

2017

Crystals

View full text Add to dashboard Cite

Abstract:Various spherulites or spherulitic crystals are widely encountered in polymeric materials when crystallized from viscous melts or concentrated solutions. However, the microstructures and growth processes are quite complicated and remain unclear and, thus, the formation mechanisms are rather elusive. Here, diverse kinds of spherulitic growths and patterns of typical polyesters via evaporative crystallization of solution-cast thin films are delineated after detailed investigating the microstructures and in situ following the developing processes. The spherulitic crystals produced under different evaporation conditions reflect variously optical features, such as the usual Maltese Cross, non-birefringent or half-birefringent concentric-rings, extinction spiral banding, and even a nested ring-banded pattern. Polymer spherulites are composed of stacks of radial fibrillar lamellae, and the diversity of bewitchingly spherulitic morphologies is dominated by the arrangement and organization of radial lamellae, which is predicted to be tunable by modulating the evaporative crystallization processes. The emergence of various types of spherulitic morphologies of the same polymer is attributed to a precise manipulation of the radial lamellar organization by a coupling of structural features and specific crystal evolving courses under confined evaporation environments. The present findings improve dramatically the understanding of the structural development and crystallization mechanism for emergence of diverse polymer spherulitic morphologies.

show abstract

Section: Manipulating the Stacking Of Radial Lamellae To Prepare Concmentioning

confidence: 96%

Section: Manipulating the Stacking Of Radial Lamellae To Prepare Concmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Morphological Control of Polymer Spherulites via Manipulating Radial Lamellar Organization upon Evaporative Crystallization: A Mini Review

Wang

2017

Crystals

View full text Add to dashboard Cite

show abstract

Surface‐induced Polymer Crystallization

Sun

Yan

2016

Polymer Morphology

View full text Add to dashboard Cite

Wachstumsinduziertes Biegen und Verwinden von Einkristallen

et al. 2014

View full text Add to dashboard Cite

Kristalle von verschiedenen Stoffen, z. B. von Elementen, Mineralien, einfachen Salzen, organischen Molekülkristallen und hochmolekularen Polymeren, können die Translationsfernordnung aufgeben, indem sie sich während des Wachstums verwinden und verbiegen. Diese Erscheinungen wurden bei Kristallen im Größenbereich von Nano‐ bis Zentimetern beobachtet. Wir analysieren, wie und warum viele Materialien solche oft drastischen nichtkristallographischen Verzerrungen wählen und betonen dabei die Kristallchemie, die zu Spannungen an Oberflächen von Kristalliten oder innerhalb des Volumens führt.

show abstract

Depletion-Induced Nonbirefringent Banding in Thin Isotactic Polystyrene Thin Films

Cited by 94 publications

References 12 publications

Morphological Control of Polymer Spherulites via Manipulating Radial Lamellar Organization upon Evaporative Crystallization: A Mini Review

Morphological Control of Polymer Spherulites via Manipulating Radial Lamellar Organization upon Evaporative Crystallization: A Mini Review

Surface‐induced Polymer Crystallization

Wachstumsinduziertes Biegen und Verwinden von Einkristallen

Contact Info

Product

Resources

About