Next Article in Journal
A Crosslinked Soybean Protein Isolate Gel Polymer Electrolyte Based on Neutral Aqueous Electrolyte for a High-Energy-Density Supercapacitor
Next Article in Special Issue
Effect of Curing Agent on the Compressive Behavior at Elevated Test Temperature of Carbon Fiber-Reinforced Epoxy Composites
Previous Article in Journal
Holographic Formation of Non-uniform Diffraction Structures by Arbitrary Polarized Recording Beams in Liquid Crystal-photopolymer Compositions
Previous Article in Special Issue
One-Pot Synthesis of Amide-Functional Main-Chain Polybenzoxazine Precursors
Open AccessArticle

Semi-Interpenetrating Polymer Networks Based on Cyanate Ester and Highly Soluble Thermoplastic Polyimide

1
College of Chemical Engineering, Changchun University of Technology, Changchun 130012, China
2
Laboratory of Polymer Composites Engineering, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022, China
3
Aerospace Research Institute of Special Materials & Technology, Beijing 100074, China
4
Ningbo Institute of Material Technology & Engineering, Chinese Academy of Science, Ningbo 315201, China
*
Authors to whom correspondence should be addressed.
Polymers 2019, 11(5), 862; https://doi.org/10.3390/polym11050862
Received: 24 April 2019 / Revised: 8 May 2019 / Accepted: 10 May 2019 / Published: 13 May 2019
(This article belongs to the Special Issue Thermosets II)
Thermoplastic polyimide (TPI) was synthesized via a traditional one-step method using 2,3,3′,4′-biphenyltetracarboxylic dianhydride (3,4′-BPDA), 4,4′-oxydianiline (4,4′-ODA), and 2,2′-bis(trifluoromethyl)benzidine (TFMB) as the monomers. A series of semi-interpenetrating polymer networks (semi-IPNs) were produced by dissolving TPI in bisphenol A dicyanate (BADCy), followed by curing at elevated temperatures. The curing reactions of BADCy were accelerated by TPI in the blends, reflected by lower curing temperatures and shorter gelation time determined by differential scanning calorimetry (DSC) and rheological measurements. As evidenced by scanning electron microscopy (SEM) images, phase separation occurred and continuous TPI phases were formed in semi-IPNs with a TPI content of 15% and 20%. The properties of semi-IPNs were systematically investigated according to their glass transition temperatures (Tg), thermo-oxidative stability, and dielectric and mechanical properties. The results revealed that these semi-IPNs possessed improved mechanical and dielectric properties compared with pure polycyanurate. Notably, the impact strength of semi-IPNs was 47%–320% greater than that of polycyanurate. Meanwhile, semi-IPNs maintained comparable or even slightly higher thermal resistance in comparison with polycyanurate. The favorable processability and material properties make TPI/BADCy blends promising matrix resins for high-performance composites and adhesives. View Full-Text
Keywords: thermoplastic polyimide; cyanate ester; semi-interpenetrating polymer network; toughness; dielectric properties thermoplastic polyimide; cyanate ester; semi-interpenetrating polymer network; toughness; dielectric properties
Show Figures

Graphical abstract

MDPI and ACS Style

Liu, J.; Fan, W.; Lu, G.; Zhou, D.; Wang, Z.; Yan, J. Semi-Interpenetrating Polymer Networks Based on Cyanate Ester and Highly Soluble Thermoplastic Polyimide. Polymers 2019, 11, 862. https://doi.org/10.3390/polym11050862

AMA Style

Liu J, Fan W, Lu G, Zhou D, Wang Z, Yan J. Semi-Interpenetrating Polymer Networks Based on Cyanate Ester and Highly Soluble Thermoplastic Polyimide. Polymers. 2019; 11(5):862. https://doi.org/10.3390/polym11050862

Chicago/Turabian Style

Liu, Jingfeng; Fan, Weifeng; Lu, Gewu; Zhou, Defeng; Wang, Zhen; Yan, Jingling. 2019. "Semi-Interpenetrating Polymer Networks Based on Cyanate Ester and Highly Soluble Thermoplastic Polyimide" Polymers 11, no. 5: 862. https://doi.org/10.3390/polym11050862

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop