Tuning star architecture to control mechanical properties and impact resistance of polymer thin films

This study reports on the effect of UV-light on the mechanical properties of bio polymer thin films (BPF) doped with 10 % Titanium Dioxide (TiO2). Bio monomer was mixed with 4, 4-methylenebis (phenylisocyanate) (MDI) to produce neat BPF and TiO2 was added to form BPF doped with 10 % TiO2. The film samples were irradiated in UV Accelerated Weatherometer at 50 °C with different exposure time. Universal Testing Machine was used to measure the tensile strength and the fracture surfaces of the tensile specimens were observed by Scanning Electron Microscopy (SEM). The maximum tensile strength of UV irradiated neat BPF is lower than BPF doped with 10 % TiO2 of 3.5 MPa and 4.2 MPa respectively. Stress of neat BPF was decreased from 3.7 MPa to 3.2 MPa after 144 hours of UV exposure at 50 °C while BPF doped with 10 % TiO2 decrease from 4.7 to 3.6 MPa. The Modulus Young of neat BPF is lower than BPF doped with 10 % TiO2 which are 0.32 GPa and 0.33 GPa respectively. The cumulative strain percentage irradiated neat BPF is lower than BPF doped with 10 % TiO2 with 98.7 % and 113.7 % respectively. Unexposed UV light of neat BPF and BPF doped with 10 % TiO2 were observed by SEM shows smooth fracture and brittle fracture respectively. Neat BPF and BPF doped with 10 % TiO2 exposed to UV light show higher ductility property as compared to unexposed BPF. The higher the exposure time of BPF to UV light, revealed systematic increment of tensile strength due to increased crosslink between isocyanate and hydroxyl group.

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Local dynamic mechanical properties in model free-standing polymer thin films

The Journal of Chemical Physics ◽

10.1063/1.1873732 ◽

2005 ◽

Vol 122 (14) ◽

pp. 144712 ◽

Cited By ~ 58

Author(s):

Kenji Yoshimoto ◽

Tushar S. Jain ◽

Paul F. Nealey ◽

Juan J. de Pablo

Keyword(s):

Thin Films ◽

Mechanical Properties ◽

Polymer Thin Films ◽

Dynamic Mechanical Properties ◽

Local Dynamic ◽

Free Standing ◽

Dynamic Mechanical ◽

Model Free

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Mechanical Properties of Fullerene Polymer Thin Films (4th report)

The Proceedings of Yamanashi District Conference ◽

10.1299/jsmeyamanashi.2016.353 ◽

2016 ◽

Vol 2016 (0) ◽

pp. 353

Author(s):

Katsumi FUKUDA ◽

Mitsuo KOBAYASHI ◽

Kenji SUZUKI ◽

Jun ONOE ◽

Masato NAKAYA ◽

...

Keyword(s):

Thin Films ◽

Mechanical Properties ◽

Polymer Thin Films

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Strain–Microstructure–Optoelectronic Inter-Relationship toward Engineering Mechano-Optoelectronic Conjugated Polymer Thin Films

Polymers ◽

10.3390/polym13060935 ◽

2021 ◽

Vol 13 (6) ◽

pp. 935

Author(s):

Youngmin Lee ◽

Alfred Mongare ◽

Aaron Plant ◽

Donghyeon Ryu

Keyword(s):

Thin Films ◽

Mechanical Properties ◽

Conjugated Polymer ◽

Polymer Thin Films ◽

Photovoltaic Performance ◽

Acid Methyl Ester ◽

Mechanical Deformation ◽

Optoelectronic Properties ◽

Polymer Thin Film ◽

Insight Into

Mechano-optoelectronic (MO) behavior indicates changes in optoelectronic properties in response to the applied mechanical deformation. The MO behavior can be employed to monitor the mechanical deformation of a targeted system by tracing its optoelectronic properties. Poly(3-hexylthiophene) and phenyl-C61-butyric acid methyl ester (P3HT/PCBM) blend thin films exhibited changes in direct current under tensile strain. Although optoelectronic properties and photovoltaic performance of P3HT/PCBM blends have been studied extensively and intensively, research required for MO properties has a fundamental difference from previous research mostly for solar cells. In research for MO systems, a greater extent of changes in optoelectronic properties under mechanical deformation is favorable. Herein, previous research for optoelectronic properties and mechanical properties of conjugated polymers will be reviewed from a perspective on MO properties. The microstructure of a conjugated polymer thin film plays a pivotal role in its optoelectronic properties and mechanical properties. Key parameters involved in the microstructure of conjugated polymer thin films will be addressed. A scalable process is required to broaden applications of MO systems. Potential challenges in the fabrication of MO conjugated polymer thin films will be discussed. Finally, this review is envisioned to provide insight into the design and manufacturing of MO conjugated polymer thin films.

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Side Chain Influence on the Mechanical Properties and Water Uptake of Confined Comb-Shaped Cationic Polymer Thin Films

Macromolecular Chemistry and Physics ◽

10.1002/macp.201600254 ◽

2016 ◽

Vol 217 (21) ◽

pp. 2442-2451 ◽

Cited By ~ 5

Author(s):

Douglas I. Kushner ◽

Liang Zhu ◽

Ahmet Kusoglu ◽

Michael A. Hickner

Keyword(s):

Thin Films ◽

Mechanical Properties ◽

Water Uptake ◽

Polymer Thin Films ◽

Cationic Polymer ◽

Side Chain

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Molecular structure and thermal/mechanical properties of polymer thin films

Journal of Physics and Chemistry of Solids ◽

10.1016/0022-3697(94)90129-5 ◽

1994 ◽

Vol 55 (10) ◽

pp. 1115-1124 ◽

Cited By ~ 17

Author(s):

Paul S. Ho ◽

Tze Wing Poon ◽

Jihperng Leu

Keyword(s):

Molecular Structure ◽

Thin Films ◽

Mechanical Properties ◽

Polymer Thin Films ◽

Thermal Mechanical Properties

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A study on electrical and mechanical properties of hybrid-polymer thin films by a controlled TEOS bubbling ratio

Applied Surface Science ◽

10.1016/j.apsusc.2008.02.095 ◽

2008 ◽

Vol 254 (23) ◽

pp. 7817-7820 ◽

Cited By ~ 12

Author(s):

S.-J. Cho ◽

I.-S. Bae ◽

H.-D. Jeong ◽

J.-H. Boo

Keyword(s):

Thin Films ◽

Mechanical Properties ◽

Polymer Thin Films ◽

Hybrid Polymer

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A STUDY OF THE CHARACTERISTICS OF ORGANIC–INORGANIC HYBRID PLASMA-POLYMER THIN FILMS BY CO-DEPOSITION OF TOLUENE AND TEOS

Surface Review and Letters ◽

10.1142/s0218625x10013989 ◽

2010 ◽

Vol 17 (03) ◽

pp. 353-358 ◽

Cited By ~ 5

Author(s):

SANG-JIN CHO ◽

SUNGWOO LEE ◽

DONGGEUN JUNG ◽

JIN-HYO BOO

Keyword(s):

Thin Films ◽

Mechanical Properties ◽

Polymer Thin Films ◽

Chemical Vapor ◽

Dielectric Constants ◽

Plasma Polymer ◽

Hybrid Polymer ◽

Inorganic Hybrid ◽

Hybrid Plasma ◽

Ft Ir

We investigated the interaction of varied plasma power with ultralow-κ Toluene–TEOS hybrid plasma-polymer thin films, as well as changes in electrical and mechanical properties with various mixture ratios of toluene and TEOS (tetraethoxysilane). Using the plasma enhanced chemical vapor deposition (PECVD) method, organic–inorganic hybrid polymer thin films were deposited on silicon(100) substrates under 150°C of wall temperature and a ratio of TEOS to toluene. Toluene and TEOS were utilized as organic and inorganic precursors, and hydrogen and argon were used as bubbler and carrier gases, respectively. In order to compare the differences in the electrical and the mechanical properties of plasma polymerized thin films, we grew the hybrid polymer thin films under 30 W of RF (radio frequency using 13.56 MHz) power with various ratios of toluene to TEOS. The as-grown polymerized thin films were first analyzed by Fourier Transform Infrared (FT-IR) spectroscopy, and Atomic Force Microscopy (AFM). The results of FT-IR showed that the hybrid polymer thin films were totally fragmented and polymerized with increasing RF power. AFM showed that polymer films with smooth surface could be grown under various deposition conditions. An impedance analyzer was utilized for the measurements of capacitance values for dielectric constants and the thin films were analyzed for hardness and Young's modulus using a nanoindenter.

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