Segmental Shadowing Effect on Ultraviolet Depolymerization and Resulting Molecular Weight Distribution

Ezgi Erdogan; Nazmi Postacioglu; Ahmet Giz

Segmental Shadowing Effect on Ultraviolet Depolymerization and Resulting Molecular Weight Distribution

Ezgi Erdogan, Nazmi Postacioglu, Ahmet Giz

Department of Physics Engineering

Istanbul Technical University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Ultraviolet degradation of polymers in dilute solutions is simulated. The resulting molecular weight distribution and polydispersity evolutions are calculated for good, theta and poor solvents. Simulations show that, when the effect of shadowing among chain segments is taken into account, chain scission is not completely random. The effect is subtle, but it is observable in poor and theta solvents, especially in the 1/Mn and the d(1/Mn)/dt versus time graphics. Shadowing magnifies the increase in the polydispersity, when a polymer sample with a narrow molecular weight distribution is irradiated.

Original language	English
Title of host publication	Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015
Editors	Jamal Chaouki, Yuyuan Zhao
Publisher	Avestia Publishing
ISBN (Print)	9781927877173
Publication status	Published - 2015
Event	World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015 - Barcelona, Spain Duration: 20 Jul 2015 → 21 Jul 2015

Publication series

Name	Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering
ISSN (Electronic)	2369-8136

Conference

Conference	World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015
Country/Territory	Spain
City	Barcelona
Period	20/07/15 → 21/07/15

Bibliographical note

Publisher Copyright:
© 2015, Avestia Publishing. All rights reserved.

Funding

This work was supported by Istanbul Technical University research fund project number 32657.

Funders	Funder number
Istanbul Teknik Üniversitesi	32657

Keywords

Kinetics
Molecular Weight Distribution
Polymer Degradation
Simulation
Ultraviolet Irradiation

Cite this

Erdogan, E., Postacioglu, N., & Giz, A. (2015). Segmental Shadowing Effect on Ultraviolet Depolymerization and Resulting Molecular Weight Distribution. In J. Chaouki, & Y. Zhao (Eds.), Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015 (Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering). Avestia Publishing.

Erdogan, Ezgi ; Postacioglu, Nazmi ; Giz, Ahmet. / Segmental Shadowing Effect on Ultraviolet Depolymerization and Resulting Molecular Weight Distribution. Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015. editor / Jamal Chaouki ; Yuyuan Zhao. Avestia Publishing, 2015. (Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering).

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title = "Segmental Shadowing Effect on Ultraviolet Depolymerization and Resulting Molecular Weight Distribution",

abstract = "Ultraviolet degradation of polymers in dilute solutions is simulated. The resulting molecular weight distribution and polydispersity evolutions are calculated for good, theta and poor solvents. Simulations show that, when the effect of shadowing among chain segments is taken into account, chain scission is not completely random. The effect is subtle, but it is observable in poor and theta solvents, especially in the 1/Mn and the d(1/Mn)/dt versus time graphics. Shadowing magnifies the increase in the polydispersity, when a polymer sample with a narrow molecular weight distribution is irradiated.",

keywords = "Kinetics, Molecular Weight Distribution, Polymer Degradation, Simulation, Ultraviolet Irradiation",

author = "Ezgi Erdogan and Nazmi Postacioglu and Ahmet Giz",

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language = "English",

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series = "Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering",

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Erdogan, E, Postacioglu, N & Giz, A 2015, Segmental Shadowing Effect on Ultraviolet Depolymerization and Resulting Molecular Weight Distribution. in J Chaouki & Y Zhao (eds), Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015. Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, Avestia Publishing, World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015, Barcelona, Spain, 20/07/15.

Segmental Shadowing Effect on Ultraviolet Depolymerization and Resulting Molecular Weight Distribution. / Erdogan, Ezgi; Postacioglu, Nazmi; Giz, Ahmet.
Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015. ed. / Jamal Chaouki; Yuyuan Zhao. Avestia Publishing, 2015. (Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Segmental Shadowing Effect on Ultraviolet Depolymerization and Resulting Molecular Weight Distribution

AU - Erdogan, Ezgi

AU - Postacioglu, Nazmi

AU - Giz, Ahmet

PY - 2015

Y1 - 2015

N2 - Ultraviolet degradation of polymers in dilute solutions is simulated. The resulting molecular weight distribution and polydispersity evolutions are calculated for good, theta and poor solvents. Simulations show that, when the effect of shadowing among chain segments is taken into account, chain scission is not completely random. The effect is subtle, but it is observable in poor and theta solvents, especially in the 1/Mn and the d(1/Mn)/dt versus time graphics. Shadowing magnifies the increase in the polydispersity, when a polymer sample with a narrow molecular weight distribution is irradiated.

AB - Ultraviolet degradation of polymers in dilute solutions is simulated. The resulting molecular weight distribution and polydispersity evolutions are calculated for good, theta and poor solvents. Simulations show that, when the effect of shadowing among chain segments is taken into account, chain scission is not completely random. The effect is subtle, but it is observable in poor and theta solvents, especially in the 1/Mn and the d(1/Mn)/dt versus time graphics. Shadowing magnifies the increase in the polydispersity, when a polymer sample with a narrow molecular weight distribution is irradiated.

KW - Kinetics

KW - Molecular Weight Distribution

KW - Polymer Degradation

KW - Simulation

KW - Ultraviolet Irradiation

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M3 - Conference contribution

AN - SCOPUS:85146709472

SN - 9781927877173

T3 - Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering

BT - Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015

A2 - Chaouki, Jamal

A2 - Zhao, Yuyuan

PB - Avestia Publishing

T2 - World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015

Y2 - 20 July 2015 through 21 July 2015

ER -

Erdogan E, Postacioglu N, Giz A. Segmental Shadowing Effect on Ultraviolet Depolymerization and Resulting Molecular Weight Distribution. In Chaouki J, Zhao Y, editors, Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering, MCM 2015. Avestia Publishing. 2015. (Proceedings of the World Congress on Mechanical, Chemical, and Material Engineering).

Segmental Shadowing Effect on Ultraviolet Depolymerization and Resulting Molecular Weight Distribution

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