3D printed remendable polylactic acid blends with uniform mechanical strength enabled by a dynamic Diels–Alder reaction

2017 ◽  
Vol 8 (13) ◽  
pp. 2087-2092 ◽  
Author(s):  
Gayan A. Appuhamillage ◽  
John C. Reagan ◽  
Sina Khorsandi ◽  
Joshua R. Davidson ◽  
Walter Voit ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Strength ◽  
Polymer Blends ◽  
Polylactic Acid ◽  
Alder Reaction ◽  
Diels Alder ◽  
Diels Alder Reaction ◽  
3D Printed

We demonstrate that uniform mechanical properties can be achieved in 3D printed polymer blends by using a dynamic Diels–Alder reaction.

scholarly journals Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1510
Author(s):  
Marek Pöschl ◽  
Shibulal Gopi Sathi ◽  
Radek Stoček ◽  
Ondřej Kratina
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Tensile Properties ◽  
Crosslinking Agent ◽  
Alder Reaction ◽  
Diels Alder ◽  
Ene Reactions ◽  
Rubber Blends ◽  
Diels Alder Reaction ◽  
Chloroprene Rubber

The rheometer curing curves of neat natural rubber (NR) and neat chloroprene rubber (CR) with maleide F (MF) exhibit considerable crosslinking torque at 180 °C. This indicates that MF can crosslink both these rubbers via Alder-ene reactions. Based on this knowledge, MF has been introduced as a co-crosslinking agent for a 50/50 blend of NR and CR in conjunction with accelerated sulfur. The delta (Δ) torque obtained from the curing curves of a blend with the addition of 1 phr MF was around 62% higher than those without MF. As the content of MF increased to 3 phr, the Δ torque was further raised to 236%. Moreover, the mechanical properties, particularly the tensile strength of the blend with the addition of 1 phr MF in conjunction with the accelerated sulfur, was around 201% higher than the blend without MF. The overall tensile properties of the blends cured with MF were almost retained even after ageing the samples at 70 °C for 72 h. This significant improvement in the curing torque and the tensile properties of the blends indicates that MF can co-crosslink between NR and CR via the Diels–Alder reaction.

scholarly journals Rewritable Shape-Memory Polylactic Acid Fabricated by Thermo-Reversible Cross-Linking Based on the Diels-Alder Reaction

2005 ◽  
Vol 62 (6) ◽  
pp. 261-267 ◽  
Author(s):  
Kazuhiko INOUE ◽  
Midori YAMASHIRO ◽  
Masatoshi IJI
Keyword(s):  
Shape Memory ◽  
Polylactic Acid ◽  
Alder Reaction ◽  
Diels Alder ◽  
Cross Linking ◽  
Diels Alder Reaction

Organogelation behavior, thermal and mechanical properties of polymer network formed by the Diels–Alder reaction of furan- and maleimide-terminated four-arm star-shaped ε-caprolactone oligomers

Polymer ◽  
2013 ◽  
Vol 54 (13) ◽  
pp. 3206-3216 ◽  
Author(s):  
Toshiaki Ikeda ◽  
Daisuke Oikawa ◽  
Toshiaki Shimasaki ◽  
Naozumi Teramoto ◽  
Mitsuhiro Shibata
Keyword(s):  
Mechanical Properties ◽  
Polymer Network ◽  
Alder Reaction ◽  
Diels Alder ◽  
Thermal And Mechanical Properties ◽  
Diels Alder Reaction

scholarly journals Improvement of Mechanical and Self-Healing Properties for Polymethacrylate Derivatives Containing Maleimide Modified Graphene Oxide

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 603 ◽  
Author(s):  
Won-Ji Lee ◽  
Sang-Ho Cha
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Alder Reaction ◽  
Diels Alder ◽  
The Self ◽  
Self Healing ◽  
Diels Alder Reaction ◽  
Healing Efficiency ◽  
Modified Graphene Oxide ◽  
Modified Graphene

In this paper, a self-healable nanocomposite based on the Diels-Alder reaction is developed. A graphene-based nanofiller is introduced to improve the self-healing efficiency, as well as the mechanical properties of the nanocomposite. Graphene oxide (GO) is modified with maleimide functional groups, and the maleimide-modified GO (mGO) enhanced the compatibility of the polymer matrix and nanofiller. The tensile strength of the nanocomposite containing 0.030 wt% mGO is improved by 172%, compared to that of a polymer film incorporating both furan-functionalized polymer and bismaleimide without any nanofiller. Moreover, maleimide groups of the surface on mGO participate in the Diels-Alder reaction, which improves the self-healing efficiency. The mechanical and self-healing properties are significantly improved by using a small amount of mGO.

scholarly journals Thermally Remendable Polyurethane Network Cross-Linked via Reversible Diels–Alder Reaction

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1935
Author(s):  
Elena Platonova ◽  
Islam Chechenov ◽  
Alexander Pavlov ◽  
Vitaliy Solodilov ◽  
Egor Afanasyev ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Differential Scanning Calorimetry ◽  
Nmr Spectroscopy ◽  
Young Modulus ◽  
Alder Reaction ◽  
Significant Loss ◽  
Diels Alder ◽  
Scanning Calorimetry ◽  
Diels Alder Reaction

We prepared a series of thermally remendable and recyclable polyurethanes crosslinked via reversible furan-maleimide Diels–Alder reaction based on TDI end-caped branched Voranol 3138 terminated with difurfurylamine and 4,4′-bis(maleimido)diphenylmethane (BMI). We showed that Young modulus strongly depends on BMI content (from 8 to 250 MPa) that allows us to obtain materials of different elasticity as simple as varying BMI content. The ability of DA and retro-DA reactions between furan and maleimide to reversibly bind material components was investigated by NMR spectroscopy, differential scanning calorimetry, and recycle testing. All polymers obtained demonstrated high strengths and could be recovering without significant loss in mechanical properties for at least five reprocessing cycles.

Preparation and Properties of Rubberlike High Polymers. II. Polymerization of Mixtures in Bulk

1947 ◽  
Vol 20 (2) ◽  
pp. 380-391
Author(s):  
C. Koningsberger ◽  
G. Salomon
Keyword(s):  
Mechanical Properties ◽  
Alder Reaction ◽  
Diels Alder ◽  
The Other ◽  
New Class ◽  
Diels Alder Reaction ◽  
Vinyl Compound ◽  
Other Hand ◽  
Higher Temperature ◽  
High Polymers

Abstract Mixtures of butadiene and dimethylbutadiene with varying quantities of styrene and acrylonitrile were copolymerized under various catalytic conditions at 100° C. The formation of cyclic dimers from dienes and vinyl compounds is, in some cases, much more pronounced than the dimerization of the dienes alone. Since the latter is also a kind of Diels-Alder reaction, a series with increasing dienophilic properties can be established from a comparison of the yields of cyclic dimers. From solubility and swelling experiments it is evident that the polymers prepared from butadiene and the vinyl compounds and those from dimethylbutadiene and acrylonitrile are true copolymers. The mechanical properties of the copolymers from butadiene and increasing amounts of a vinyl compound change gradually from those of a rubber to those of the polyvinyl compound. The copolymers from a mixture containing 30 per cent styrene or acrylonitrile are very similar to Buna-S and Perbunan, respectively. Copolymers of the same composition from dimethylbutadiene and acrylonitrile, on the other hand, form a new class of thermoplastics with a much higher temperature of elasticity.

scholarly journals Recyclable Shape-memory and Mechanical Strength of Poly(lactic acid) Compounds Cross-linked by Thermo-reversible Diels-Alder Reaction

2008 ◽  
Vol 40 (7) ◽  
pp. 657-662 ◽  
Author(s):  
Midori Yamashiro ◽  
Kazuhiko Inoue ◽  
Masatoshi Iji
Keyword(s):  
Lactic Acid ◽  
Mechanical Strength ◽  
Shape Memory ◽  
Alder Reaction ◽  
Diels Alder ◽  
Poly Lactic Acid ◽  
Diels Alder Reaction

The Diels-Alder Reaction of 2-Ethenyl-1,4-Benzodioxin: A New and Simple Synthesis of Bisaryl Ethers

Synlett ◽  
1989 ◽  
Vol 1989 (01) ◽  
pp. 30-32
Author(s):  
Thomas V. Lee ◽  
Alistair J. Leigh ◽  
Christopher B. Chapleo
Keyword(s):  
Alder Reaction ◽  
Diels Alder ◽  
Simple Synthesis ◽  
Diels Alder Reaction

Asymmetric aza-Diels-Alder reaction of Danishefsky’s diene with imines in a chiral reaction medium

2006 ◽  
Author(s):  
Giang Vo-Thanh ◽  
Bruce Pégot ◽  
Olivier Van Buu ◽  
Didier Gori
Keyword(s):  
Reaction Medium ◽  
Alder Reaction ◽  
Diels Alder ◽  
Diels Alder Reaction ◽  
Danishefsky's Diene
Sign in / Sign up

Export Citation Format

Share Document