Synthesis and thermal, mechanical, and optical properties of A-B-A or A-B block copolymers containing poly(norbornene-co-1-octene)

2013 ◽  
Vol 52 (2) ◽  
pp. 267-271 ◽  
Author(s):  
Ryo Tanaka ◽  
Takuya Suenaga ◽  
Zhengguo Cai ◽  
Yuushou Nakayama ◽  
Takeshi Shiono
Keyword(s):  
Optical Properties ◽  
Block Copolymers

Preparation of amphiphilic block copolymers (polyethylene adipate-block-polyethylene glycol) and its application in rotogravure ink formulations

2018 ◽  
Vol 47 (5) ◽  
pp. 415-423 ◽  
Author(s):  
Yasser Assem ◽  
Heba A. Mohamed ◽  
Rana Said ◽  
Ahmed El-Masry
Keyword(s):  
Optical Properties ◽  
Polyethylene Glycol ◽  
Block Copolymers ◽  
Ethylene Glycol ◽  
Adipic Acid ◽  
Amphiphilic Block Copolymers ◽  
Synthesis Process ◽  
Gravimetric Analysis ◽  
Content Type ◽  
Molecular Weights

Purpose The purpose of this paper is to prepare amphiphilic block copolymers polyethylene adipate-block-polyethylene glycol (PEA-b-PEG)s and study their performance as plasticizers in rotogravure ink formulations. Design/methodology/approach Series of amphiphilic block copolymers (PEA-b-PEG1), (PEA-b-PEG2), (PEA-b-PEG3), (PEA-b-PEG4) and (PEA-b-PEG5) were prepared by the reaction of adipic acid, ethylene glycol and polyethylene glycol of different molecular weights (300, 1,000, 2,000, 10,000 and 20,000 g/mol), respectively. Full characterization of the prepared copolymers was achieved using Fourier Transfer Infrared Spectroscopy (FTIR), 1H NMR, thermal gravimetric analysis (TGA) and differential scanning calorimetry (DSC). The performance of the prepared copolymers as plasticizers for neat nitrocellulose resin were studied in different formulations, namely, R1, R2, R3, R4 and R5 containing copolymers (PEA-b-PEG1), (PEA-b-PEG2), (PEA-b-PEG3), (PEA-b-PEG4) and (PEA-b-PEG5), respectively. In addition to formula R0 that contains acetyl tributyl citrate (ATBC) as a commercial plasticizer. The mechanical properties, thermal analysis (DSC, TGA) and optical properties of the prepared formulations films were investigated. Theses amphiphilic block copolymers were then applied as plasticizers in different rotogravure ink formulations (F1, F2, F3, F4 and F5) and compared with commercial rotogravure ink formula (F0). The color measurements and optical properties of all formulations were achieved. Findings It was found that the performance of the prepared copolymers as plasticizers in different formulations based on nitro cellulose resin gives better gloss, adhesion for R1 compared with the other samples and color strength for F1 compared with F0. Finally, all the samples gave excellent plasticizing effect. Research limitations/implications The authors believe that type of these materials open the way for a new class of plasticizers that upon application or even degradation gives small ecofriendly molecules (adipic acid and or ethylene glycol moieties) taking into consideration the simplicity of the rout of the synthesis process. Practical implications The prepared ecofriendly (PEA-b-PEG)s could be successfully used as plasticizers instead of commercial plasticizer ATBC. Originality/value The research provides that the prepared (PEA-b-PEG)s with different molecular weights can act as plasticizers in rotogravure ink formulations, and their performance was acceptable and available.

Local environment influence on the optical properties of block copolymers containing an epoxy-based azo-prepolymer

2013 ◽  
Vol 49 (11) ◽  
pp. 3702-3712 ◽  
Author(s):  
Raquel Fernández ◽  
Connie Ocando ◽  
Arantxa Eceiza ◽  
Agnieszka Tercjak
Keyword(s):  
Optical Properties ◽  
Block Copolymers ◽  
Local Environment ◽  
Environment Influence

Effect of Temperature on Stress-Optical Properties of Styrene Butadiene Block Copolymers

1967 ◽  
Vol 40 (5) ◽  
pp. 1373-1380 ◽  
Author(s):  
E. Fischer ◽  
J. F. Henderson
Keyword(s):  
Optical Properties ◽  
Block Copolymers ◽  
Network Structure ◽  
Effect Of Temperature ◽  
Stress Strain ◽  
Two Phase ◽  
Phase Systems ◽  
Effective Network ◽  
Restricted Mobility ◽  
Styrene Butadiene

Abstract Stress, strain, and optical properties of three elastomeric styrene butadiene block copolymers containing 31, 40 and 49 wt per cent styrene were studied as a function of temperature. Mechanical and optical properties indicate that these materials are two phase systems in which the polybutadiene chains form an elastomeric phase and the polystyrene a glassy phase with the latter providing physical crosslinks. Birefringence measurements indicate that decreases in modulus and strength of these materials are associated with decrease in concentration of elastically effective network chains. Independence of stress-optical coefficient of temperature suggests that the decrease in concentration of elastically effective chains is not due to onset of rubberlike behavior or flow within the polystyrene regions themselves, at least for temperatures below about 70° C. Rather, the decrease seems to be associated with increased mobility of the polybutadiene chains at higher temperatures, which also leads to an increase in the rate of stress relaxation. Birefringence measured during extension and retraction showed that stress strain hysteresis is due to restricted mobility of polybutadiene chain segments rather than to permanent viscous flow or to change in the effective network structure of the block copolymers. The ultimate properties of these rubbers were well correlated with the effective network structure in undeformed specimens.

scholarly journals Nonlinear optical properties of gold nanoparticles selectively introduced into the periodic microdomains of block copolymers

2008 ◽  
Vol 16 (8) ◽  
pp. 5362 ◽  
Author(s):  
Kosuke Tsuchiya ◽  
Satoshi Nagayasu ◽  
Shigeru Okamoto ◽  
Tomokatsu Hayakawa ◽  
Takehiko Hihara ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Block Copolymers ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties

Designing hierarchical structures of complex electronically conducting organic polymers via one-step electro-polymerization

2020 ◽  
Vol 8 (17) ◽  
pp. 5934-5940 ◽  
Author(s):  
Tharindu A. Ranathunge ◽  
Duong T. Ngo ◽  
Dilan Karunarathilaka ◽  
Nuwan H. Attanayake ◽  
Indika Chandrasiri ◽  
...  
Keyword(s):  
Optical Properties ◽  
Block Copolymers ◽  
Conjugated Polymers ◽  
Hierarchical Structures ◽  
Organic Polymers ◽  
Versatile Tool ◽  
One Step

Using electro-copolymerization as a versatile tool in synthesizing alternating and block copolymers, we have designed conjugation polymers with unique optical properties and excellent conductivities in comparison to conventional conjugated polymers.

Mechano-optical properties and structure of statistical and block copolymers of styrene and vinyltrimethylsilane

1988 ◽  
Vol 30 (3) ◽  
pp. 640-644
Author(s):  
V.K. Turkov ◽  
A.Ye. Grishchenko ◽  
V.Ya. Nikolayev ◽  
O.B. Semenov ◽  
V.G. Filippova
Keyword(s):  
Optical Properties ◽  
Block Copolymers
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