Hydrophilic PDMS with a sandwich-like structure and no loss of mechanical properties and optical transparency

2020 ◽  
Vol 503 ◽  
pp. 144126 ◽  
Author(s):  
Hailong Hu ◽  
Siqi Li ◽  
Cheng Ying ◽  
Rong Zhang ◽  
Yuelian Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Optical Transparency

scholarly journals Transparent Polyimide/Organoclay Nanocomposite Films Containing Different Diamine Monomers

Polymers ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 135 ◽  
Author(s):  
Hyeon Il Shin ◽  
Jin-Hae Chang
Keyword(s):  
Mechanical Properties ◽  
Critical Concentration ◽  
Amic Acid ◽  
Optical Transparency ◽  
Nanocomposite Films ◽  
Hybrid Films ◽  
Solution Intercalation ◽  
Oh Groups ◽  
Cloisite 30B ◽  
Intercalation Polymerization

Poly (amic acid) s (PAAs) were synthesized using 4,4′-(hexafluoroisopropyl-idene) diphthalic anhydride (6FDA) and two types of diamines—bis(3-aminophenyl) sulfone (BAS) and bis(3-amino-4-hydroxyphenyl) sulfone (BAS-OH). Two series of transparent polyimide (PI) hybrid films were synthesized by solution intercalation polymerization and thermal imidization using various concentrations (from 0 to 1 wt%) of organically modified clay Cloisite 30B in PAA solution. The thermo-mechanical properties, morphology, and optical transparency of the hybrid films were observed. The transmission electronic microscopy (TEM) results showed that some of the clays were agglomerated, but most of them showed dispersed nanoscale clay. The effects of -OH groups on the properties of the two PI hybrids synthesized using BAS and BAS-OH monomers were compared. The BAS PI hybrids were superior to the BAS-OH PI hybrids in terms of thermal stability and optical transparency, but the BAS-OH PI hybrids exhibited higher glass transition temperatures (Tg) and mechanical properties. Analysis of the thermal properties and tensile strength showed that the highest critical concentration of organoclay was 0.50 wt%.

Reactive polycarbonate/diallyl phthalate blends with high optical transparency, good flowability and high mechanical properties

Polymer ◽  
2016 ◽  
Vol 91 ◽  
pp. 89-97 ◽  
Author(s):  
Yanyan Liang ◽  
Xingping Zhou ◽  
Yonggui Liao ◽  
Jun Wu ◽  
Xiaolin Xie ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Optical Transparency ◽  
Diallyl Phthalate

scholarly journals Experimental Study, Characterization and Performance Test of Epoxy Cyclohexane-Based Transparent Polyurethane Material

2021 ◽  
Vol 27 (1) ◽  
pp. 63-67
Author(s):  
Xuemei WANG ◽  
Xiang GUI ◽  
Yingping QI ◽  
Yongfeng SHEN ◽  
Hua LI
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Performance Test ◽  
Membered Ring ◽  
Molecular Chain ◽  
Optical Transparency ◽  
Synthesis Process ◽  
R Value ◽  
And Performance ◽  
Weather Resistance

A novel epoxy cyclohexane-based polyurethane material was synthesized from a self-made epoxy cyclohexane-tetrahydrofuran (CHO-THF) co-polyether. Due to the special rigid six-membered ring skeleton in the polyether molecular chain, the polyurethane materials have excellent mechanical properties, good optical transparency and weather resistance. In this paper, the synthesis process of the epoxy cyclohexane-based polyurethane material was studied and the properties of the material were tested. The results showed that curing parameters R value had effects on the mechanical properties and optical transparency of the material.

Mo/W/Al doped tin oxide thin films: Exploring optical and mechanical properties for transparent protective coating applications

2021 ◽  
Author(s):  
Parnandi Venkata Rajeswari ◽  
Yadavalli Venkata Pavana Kumar Raghava ◽  
Sumanta Kumar Tripathy ◽  
Nidasanametla Soma Sundara Venkata Raja Rao
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Oxide Film ◽  
Tin Oxide ◽  
Protective Coatings ◽  
Elastic Recovery ◽  
Optical Transparency ◽  
Oxide Thin Films ◽  
Average Transmission ◽  
Optical And Mechanical Properties

For the last few years research has been intensified in exploring and improving mechanical properties of tin oxide thin films besides the optical and electrical ones that enhances the film’s functionality and broadens its application purview. The present investigation reports a comprehensive study on the effect of Mo, W, and Al doping on optoelectronic and mechanical properties of tin oxide thin films. The films exhibited an optical transparency over 350-400 nm with an average transmission of 85-98% at 550 nm and mechanical hardness spanning over 2-8 GPa, and electrically resistivity in the range 900-200 Ωm, based on the dopant used and its content. Compared to bare tin oxide film, the doped films exhibited a decrease in optical transparency with an improvement in the hardness. 10wt.% Mo doped tin oxide film exhibited good average optical transparency 72% at 550 nm, highest elastic recovery of 70%, highest hardness 8.0 ± 0.5 GPa and reduced-modulus of 89 ± 0.5 GPa of all the films. The investigation demonstrates a simple technique of producing mechanically hard tin oxide thin films useful as transparent protective coatings.

scholarly journals Effects of diamine isomers on the properties of colorless and transparent copoly(amide imide)s

RSC Advances ◽  
2021 ◽  
Vol 11 (48) ◽  
pp. 30479-30486
Author(s):  
Moon Young Choi ◽  
Seon Ju Lee ◽  
Lee Ku Kwac ◽  
Hong Gun Kim ◽  
Jin-Hae Chang
Keyword(s):  
Mechanical Properties ◽  
Optical Transparency ◽  
Thermal And Mechanical Properties

The thermal- and mechanical-properties and optical transparency of the copoly(amide imide) films with different BPA monomer contents were investigated.

Synthesis and properties of transparent polyimides derived from 1,4-cyclohexylene bis(trimellitate anhydride)

2017 ◽  
Vol 29 (6) ◽  
pp. 627-635 ◽  
Author(s):  
Guofei Chen ◽  
Yu Zhou ◽  
Kai Ma ◽  
Wei Wang ◽  
Xingzhong Fang
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Optical Transparency ◽  
Transition Temperatures ◽  
Step Method ◽  
Glass Transition Temperatures

A series of polyimides (PIs) derived from 1,4-cyclohexylene bis(trimellitate anhydride) (TACH) was synthesized by conventional two-step method with chemical imidization. The resulting PIs had glass transition temperatures ( Tgs) in the range of 188–240°C and exhibited good mechanical properties with tensile strengths of 50.0–90.2 MPa, tensile moduli of 2.2–3.9 GPa, and elongations at break of 2.9–5.8%. These PI films showed high optical transparency with cut-off wavelengths of 345–369 nm and high transmittance at 500 nm with more than 84%. Compared with PIs derived from 1,4-bis(3,4-dicarboxyphenoxy)cyclohexane dianhydride, the TACH-based PIs showed higher Tg, better solubility, and competitive transparency.

Sign in / Sign up

Export Citation Format

Share Document