Synthesis and rapid cement hardening evaluation of polycarboxylate superplasticizers incorporating ester groups in their backbone chain

2020 ◽  
Vol 137 (34) ◽  
pp. 48989
Author(s):  
Peitao Yu ◽  
Hao Pang ◽  
Jianheng Huang ◽  
Yeyun Meng ◽  
Hao Huang ◽  
...  
Keyword(s):  
Backbone Chain

scholarly journals A Review of Polysiloxanes in Terms of Their Application in Explosives

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1080
Author(s):  
Karol Zalewski ◽  
Zbigniew Chyłek ◽  
Waldemar A. Trzciński
Keyword(s):  
Current State ◽  
Backbone Chain ◽  
Silicon Oxygen

Polysiloxanes are reviewed for their properties depending on the functionalization of a silicon–oxygen backbone chain. Next, the properties were referred to the requirements that polymers used in plastic/polymer-bonded explosive (PBX)-type explosives must meet. Finally, the current state and prospects for the implementation of polysiloxanes in plastic/polymer-bonded explosive (PBX) formulations are presented.

Molecular assembly of alkyl chain-grafted poly(l-lysine) tuned by backbone chain length and grafted alkyl chain

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 22783-22791 ◽  
Author(s):  
Bo-Yu Chen ◽  
Yun-Chiao Huang ◽  
Jeng-Shiung Jan
Keyword(s):  
Chain Length ◽  
Polypeptide Chain ◽  
Alkyl Chain ◽  
Molecular Assembly ◽  
Alkyl Chains ◽  
Backbone Chain

Alkyl chain-grafted poly(l-lysine) vesicles with tunable molecular assembly were prepared by varying the polypeptide chain length and grafted alkyl chains.

scholarly journals Progress in the Synthesis of Bifunctionalized Polyhedral Oligomeric Silsesquioxane

Polymers ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2098 ◽  
Author(s):  
Mingyue Wang ◽  
Hong Chi ◽  
Joshy K.S. ◽  
Fuke Wang
Keyword(s):  
Optical Properties ◽  
Composite Materials ◽  
Aromatic Ring ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Industrial Research ◽  
Hybrid Nature ◽  
Backbone Chain ◽  
Polymer Hybrids ◽  
Recent Developments ◽  
Oligomeric Silsesquioxane

Polyhedral oligomeric silsesquioxane (POSS) has been considered as one of the most promising nanofillers in academic and industrial research due to its unique multifunctional nanostructure, easy functionalization, hybrid nature, and high processability. The progress of POSS has been extensive, particularly applications based on single- or multiple-armed POSS. In polymer hybrids, in order to enhance the properties, bifunctional POSS has been incorporated into the backbone chain of the polymer. This review summarizes recent developments in the synthesis, modification, and application of bifunctional POSS-containing composite materials. This includes amino-POSS, hydroxyl-POSS, aromatic ring-POSS, ether-POSS, and vinyl groups-POSS and their applications, exemplified by polyurethanes (PUs) and polyimides (PIs). In addition, the review highlights the enhancement of thermal, mechanical, and optical properties of the composites.

Development and Characterization of Bismaleimides Containing Aliphatic Chain for Microelectronics Application

e-Polymers ◽  
2006 ◽  
Vol 6 (1) ◽  
Author(s):  
J. L. Feng ◽  
C. Y. Yue ◽  
K. S. Chian
Keyword(s):  
Chain Length ◽  
Moisture Absorption ◽  
Thermomechanical Analysis ◽  
Stress And Strain ◽  
Aliphatic Chain ◽  
Melting Points ◽  
Scanning Calorimetry ◽  
Backbone Chain ◽  
Gel Temperature

AbstractA series of bismaleimide systems containing aliphatic backbone chain have been synthesized and investigated. Differential Scanning Calorimetry (DSC), Thermogravimetric Analysis (TGA), Thermomechanical analysis (TMA), rheometry and tensile test were used to characterize the thermal and mechanical properties. It was noted that backbone chain length and odd-even effect affected properties. As the chain length increases, the curing peak temperature, gel temperature of BMI all increase, but the melting point, glass transition and moisture absorption decrease. The melting points of BMI-3,5,7 reduced most significantly. The tensile properties were affected by odd even effect significantly. BMI-3,5,7 with odd number of carbons have less stress and strain than those of even ones.

SURFACE PHOTODEGRADATION OF POLY(VINYLIDENE FLUORIDE) BY INNER-SHELL EXCITATION

2006 ◽  
Vol 13 (02n03) ◽  
pp. 259-263 ◽  
Author(s):  
KOJI KAMIYA OKUDAIRA ◽  
EIICHI KOBAYASHI ◽  
KAZUHIKO MASE ◽  
SATOSHI KERA ◽  
NOBUO UENO
Keyword(s):  
Vinylidene Fluoride ◽  
Early Stage ◽  
Pvdf Film ◽  
Double Bonds ◽  
X Ray ◽  
Hybrid State ◽  
Nexafs Spectrum ◽  
Backbone Chain ◽  
Bond Scission ◽  
Poly Vinylidene Fluoride

Poly(vinylidene fluoride) (PVDF, –( CH 2– CF 2)n–) shows the effective H + desorption induced by the irradiation of photon corresponding to the transition from carbon ( C ) 1s to σ( C – H )*. In order to clarify the effect of the C – H bond scission by the irradiation, near-edge X-ray absorption fine structure (NEXAFS) spectra and the kinetic energy (Ek) distribution of desorbed ion were observed. By the irradiation of photon near C 1s region, a new peak appears in the C 1s NEXAFS spectra at photon energy of 285 eV, which is about 3 eV lower than that of the lowest peak in the NEXAFS spectrum of the pristine PVDF film. The appearance of the lowest NEXAFS peak of irradiated PVDF film is assigned to the transition to π*. It indicates that the irradiation of photons near C 1s region introduces carbon–carbon double bonds into the backbone chain of PVDF. At early stage of X-ray exposure the yield of desorbed ion with low Ek (~ 2 eV) decreases rapidly. The ion with low Ek is assigned to H + desorbed from the sp3-hybrid state, which is characteristics of the pristine PVDF. It indicates that formation of double bonds in PVDF backbone chain makes the number of sp3-hybrid state decrease. This variation occurs by irradiation of photons corresponding to the transition from C 1s to σ( C – H )* more rapidly than that to the transition to σ( C – F )*.

Synthesis of new polymers containing carbanions in the backbone chain

2004 ◽  
Vol 53 (8) ◽  
pp. 1774-1775
Author(s):  
Yu. G. Gololobov ◽  
O. A. Linchenko ◽  
N. G. Senchenya ◽  
P. V. Petrovskii ◽  
I. A. Garbuzova
Keyword(s):  
Backbone Chain

Rhodium(III) Complexes with Acyclic Tetrathioether Ligands. Effects of Backbone Chain Length on the Conformation of the Rh(III) Complex

1996 ◽  
Vol 35 (26) ◽  
pp. 7546-7555 ◽  
Author(s):  
Niranjan Goswami ◽  
Roger Alberto ◽  
Charles L. Barnes ◽  
Silvia Jurisson
Keyword(s):  
Chain Length ◽  
Backbone Chain
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