scholarly journals Synthesis of Interpenetrating Polymer Networks Based on Triisocyanate-Terminated and Modified Poly(urethane-imide) with Superior Mechanical Properties

ACS Omega ◽  
2020 ◽  
Vol 5 (12) ◽  
pp. 6911-6918
Author(s):  
Rui Ma ◽  
Tianbo Zhao ◽  
Hongrong Pu ◽  
Mingliang Sun ◽  
Yonghong Cui ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Superior Mechanical Properties

Thermal and mechanical properties of simultaneous and sequential full-interpenetrating polymer networks

2004 ◽  
Vol 370 (1-2) ◽  
pp. 288-292 ◽  
Author(s):  
A Bartolotta ◽  
G Di Marco ◽  
M Lanza ◽  
G Carini ◽  
G D’Angelo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Thermal And Mechanical Properties

Studies on Nanostructured Polyurethane/Clay Interpenetrating Polymer Networks

2005 ◽  
Vol 475-479 ◽  
pp. 1001-1004
Author(s):  
Ninglin Zhou ◽  
Xiao Xian Xia ◽  
Li Li ◽  
Shao Hua Wei ◽  
Jian Shen
Keyword(s):  
Mechanical Properties ◽  
Polymer Networks ◽  
Testing Machine ◽  
Physical And Mechanical Properties ◽  
Interpenetrating Polymer Networks ◽  
Absorption Properties ◽  
Tensile Testing Machine ◽  
Swelling Agent ◽  
Silicate Layers ◽  
Polyurethane Matrix

A novel exfoliated polyurethane (PU)/clay Interpenetrating Polymer Networks (IPNs) nanocomposite has been synthesized with polyurethane and organoclay. MTPAC is used as swelling agent to treat Na-montmorillonite for forming organoclay. The results indicate that there is very good compatibility between organoclay and PU. Nanoscale silicate dispersion was analyzed by XRD. The mechanical properties of the nanocomposites have been measured by tensile testing machine. The nanocomposites show obviously improved physical and mechanical properties when compared with the pure polymer. Additionally, PU /MTPAC- clay shows lower water absorption properties than pure PU do. In addition, the reinforcing and intercalating mechanism of silicate layers in polyurethane matrix are discussed.

scholarly journals Cost-Effectively 3D-Printed Rigid and Versatile Interpenetrating Polymer Networks

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4544
Author(s):  
Osman Konuray ◽  
Arnau Sola ◽  
Jordi Bonada ◽  
Agnieszka Tercjak ◽  
Albert Fabregat-Sanjuan ◽  
...  
Keyword(s):  
3D Printing ◽  
Polymer Networks ◽  
Complex Form ◽  
Interpenetrating Polymer Networks ◽  
Dual Processing ◽  
Digital Light Processing ◽  
Superior Mechanical Properties ◽  
3D Printed ◽  
Acrylate Resin ◽  
Printed Materials

Versatile acrylate–epoxy hybrid formulations are becoming widespread in photo/thermal dual-processing scenarios, especially in 3D printing applications. Usually, parts are printed in a stereolithography or digital light processing (DLP) 3D printer, after which a thermal treatment would bestow the final material with superior mechanical properties. We report the successful formulation of such a hybrid system, consisting of a commercial 3D printing acrylate resin modified by an epoxy–anhydride mixture. In the final polymeric network, we observed segregation of an epoxy-rich phase as nano-domains, similar to what was observed in a previous work. However, in the current work, we show the effectiveness of a coupling agent added to the formulation to mitigate this segregation for when such phase separation is undesired. The hybrid materials showed significant improvement of Young’s modulus over the neat acrylate. Once the flexible, partially-cured material was printed with a minimal number of layers, it could be molded into a complex form and thermally cured. Temporary shapes were readily programmable on this final material, with easy shape recovery under mild temperatures. Inspired by repairable 3D printed materials described recently, we manufactured a large object by printing its two halves, and then joined them covalently at the thermal cure stage with an apparently seamless union.

Influence of Polyacrylate on the Compatibility in P(MMA/EA)/PU Semi-IPNs

2012 ◽  
Vol 627 ◽  
pp. 873-877
Author(s):  
Xiao Xia Jian ◽  
Le Qin Xiao ◽  
Wei Liang Zhou ◽  
Hai Qin Ding
Keyword(s):  
Mechanical Properties ◽  
Thermal Analysis ◽  
Polymer Networks ◽  
Thermoplastic Elastomer ◽  
Ethyl Acrylate ◽  
Interpenetrating Polymer Networks ◽  
Structure And Properties ◽  
Infrared Spectrometer ◽  
Nuclear Magnetic Resonance Spectrometry ◽  
Magnetic Resonance Spectrometry

The Semi-Interpenetrating Polymer Networks(Semi-IPNs) of poly(methyl methyacrylate/ethyl acrylate)(P(MMA/EA)) and polyurethane thermoplastic elastomer (PU) were synthesized by PU and copolymer of methyl methacrylate and ethyl acrylate to improve the compatibility of polymethyl methacrylate(PMMA) and PU Semi-IPNs . The structure and properties were investigated by Fourier transform infrared spectrometer, Solid nuclear magnetic resonance spectrometry, Dynamic mechanical thermal analysis and Mechanical properties. The tensile stress of (P(MMA/EA)/PU)( P(MMA/EA):PU=3:7) can get to 9.6MPa, the additional physical crosslinks and entanglement for Semi-IPNs are the reasons.

Synthesis and Characterization of a Novel Interpenetrating Polymer Networks of Polydicyclopentadiene/Polystyrene

2011 ◽  
Vol 236-238 ◽  
pp. 2679-2682 ◽  
Author(s):  
Hua Xu ◽  
Qian Ning ◽  
Da Hu Yao ◽  
Yu Xin He ◽  
Yu Qing Zhang
Keyword(s):  
Mechanical Properties ◽  
In Situ Polymerization ◽  
Polymer Networks ◽  
Soxhlet Extraction ◽  
Interpenetrating Polymer Networks ◽  
Ir Absorption ◽  
Catalytic Systems ◽  
High Penetration ◽  
Styrene Content ◽  
Polymer Alloy

Novel interpenetrating polymer networks (IPNs) of Polydicyclopentadiene/Polystyrene (PDCPD/PS) were prepared by in-situ polymerization using Ziegler-Natta and peroxide as double catalytic systems. The structure of PDCPD/PS alloy was characterized by Soxhlet extraction, infrared spectrum (IR) and scanning electron microscope (SEM). The results showed that the polymerization of dicyclopentadiene (DCPD) was facilitated in the presence of styrene and the rate of polymerization as well as the conversion of PDCPD was improved with styrene content. The strong IR absorption peaks of PS indicated high penetration of PS within PDCPD networks, and in the process forming IPNs. There were no obvious traces of PS in the alloy brittle fracture, which prepared in liquid nitrogen and was etched by toluene. This result also demonstrated that PS was dispersed in molecular level in the polymer alloy networks and it tangled with PDCPD. The measurements mechanical properties showed that the tensile strength of the polymer alloy was improved with styrene content. This may be due to homogeneous dispersion of PS in the IPNs. The synergistic effect of PS and PDCPD also played a part in enhancing the mechanical properties of polymer alloy.

Mixing the immiscible: blends of dynamic polymer networks

RSC Advances ◽  
2015 ◽  
Vol 5 (23) ◽  
pp. 17514-17518 ◽  
Author(s):  
Roberto Martin ◽  
Alaitz Rekondo ◽  
Alaitz Ruiz de Luzuriaga ◽  
Antxon Santamaria ◽  
Ibon Odriozola
Keyword(s):  
Mechanical Properties ◽  
Polymer Networks ◽  
Immiscible Blends ◽  
Crosslinked Polymer ◽  
Immiscible Polymer ◽  
Superior Mechanical Properties

Is it possible to blend two immiscible polymer networks starting from their cured state? A simple thermomechanical approach permits blending two dynamically crosslinked polymer networks, to give blends with superior mechanical properties.

Sign in / Sign up

Export Citation Format

Share Document