scholarly journals Heterotelechelic poly(propylene oxide) as migration-inhibited toughening agent in hot lithography based additive manufacturing

2021 ◽  
Vol 12 (9) ◽  
pp. 1260-1272
Author(s):  
Daniel Grunenberg ◽  
Katharina Ehrmann ◽  
Christian Gorsche ◽  
Bernhard Steyrer ◽  
Thomas Koch ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Propylene Oxide ◽  
Chain Transfer ◽  
Poly Propylene ◽  
Toughening Agent

Linking an addition–fragmentation-chain-transfer (AFCT) functionality and methacrylate moiety via poly(propylene oxide)-oligomer within one molecule creates a non-migrating AFCT-reagent aiding network-homogeneity.

scholarly journals Bimetallic Chromium Catalysts with Chain Transfer Agents: A Route to Isotactic Poly(propylene oxide)s with Narrow Dispersities

2018 ◽  
Vol 130 (20) ◽  
pp. 5833-5836 ◽  
Author(s):  
Lilliana S. Morris ◽  
M. Ian Childers ◽  
Geoffrey W. Coates
Keyword(s):  
Propylene Oxide ◽  
Chain Transfer ◽  
Chromium Catalysts ◽  
Poly Propylene ◽  
Transfer Agents

scholarly journals The Influence of Crown Ether and Alcohol on Unsaturation and Molar Mass of Poly(propylene oxide)s Prepared by Use of Potassiumt-Butoxide: Reinvestigation of Chain Transfer Reactions

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Zbigniew Grobelny ◽  
Andrzej Swinarew ◽  
Justyna Jurek-Suliga ◽  
Kinga Skrzeczyna ◽  
Jadwiga Gabor ◽  
...  
Keyword(s):  
Propylene Oxide ◽  
Room Temperature ◽  
Molar Mass ◽  
Chain Transfer ◽  
Macrocyclic Ligand ◽  
Transfer Reactions ◽  
Simultaneous Decrease ◽  
Poly Propylene ◽  
Homogeneous Polymerization ◽  
Distinct Increase

Potassiumt-butoxide dissolved in tetrahydrofuran effectively initiates homogeneous polymerization of propylene oxide at room temperature. Unsaturation and molar mass (Mn) of the polymers prepared depend on the presence of additives, such as macrocyclic ligand 18-crown-6 (L) andt-butanol. Application of the ligand alone results in distinct increase of unsaturation and decrease ofMn, whereas use oft-BuOH leads to simultaneous decrease of unsaturation andMn. Activation oft-BuOK/t-BuOH system with the ligand causes further decrease of unsaturation, that is, from 12.0 to 3.5 mol % for OK/OH (1/3) and OK/OH/L (1/3/2) systems, respectively. Unexpectedly,Mnof the polymers obtained does not practically change (~4800). This result differs from that reported earlier for neat PO polymerization initiated potassium 1-methoxy-2-propoxide/1-methoxy-2-propanol, in which in the presence of the same ligandMnincreases to ~12 400 for the same ratio of reagents. The mechanism of studied processes was discussed.

Chiral salenCo(iii) complexes with bulky substituents as catalysts for stereoselective alternating copolymerization of racemic propylene oxide with carbon dioxide and succinic anhydride

2021 ◽  
Vol 12 (12) ◽  
pp. 1776-1786
Author(s):  
Zhou Wang ◽  
Ying Mu
Keyword(s):  
Carbon Dioxide ◽  
Propylene Carbonate ◽  
Propylene Oxide ◽  
Succinic Anhydride ◽  
Poly Propylene ◽  
Alternating Copolymerization

Stereoregular poly(propylene carbonate)s and poly(propylene succinate-block-carbonate)s were synthesized with new chiral salenCo(iii) catalysts carrying bulky substituents.

scholarly journals Fabrication and characterization of the ternary composite catalyst system of ZnGA/RET/DMC for the terpolymerization of CO2, propylene oxide and trimellitic anhydride

RSC Advances ◽  
2021 ◽  
Vol 11 (15) ◽  
pp. 8782-8792
Author(s):  
Ningzhang Liu ◽  
Chuanhai Gu ◽  
Qinghe Wang ◽  
Linhua Zhu ◽  
Huiqiong Yan ◽  
...  
Keyword(s):  
Propylene Oxide ◽  
Ternary Complex ◽  
Catalyst System ◽  
Composite Catalyst ◽  
Trimellitic Anhydride ◽  
Ternary Composite ◽  
Metal Cyanide ◽  
Fabrication And Characterization ◽  
Poly Propylene

For poly(propylene carbonate trimellitic anhydride) with good yield, thermal stability and high molecular weight, a catalyst of zinc glutarate/rare earth ternary complex/double metal cyanide was used for terpolymerization of CO2, propylene oxide and trimellitic anhydride.

Thermoresponsive Core−Shell Brush Copolymers with Poly(propylene oxide)-block-poly(ethylene oxide) Side Chains via a “Grafting from” Technique

2010 ◽  
Vol 43 (4) ◽  
pp. 1771-1777 ◽  
Author(s):  
Junpeng Zhao ◽  
Grigoris Mountrichas ◽  
Guangzhao Zhang ◽  
Stergios Pispas
Keyword(s):  
Ethylene Oxide ◽  
Propylene Oxide ◽  
Core Shell ◽  
Side Chains ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Grafting From ◽  
Poly Propylene

Carbon-13 NMR determination of poly(propylene oxide) microstructure

1986 ◽  
Vol 19 (5) ◽  
pp. 1337-1343 ◽  
Author(s):  
Frederic C. Schilling ◽  
Alan E. Tonelli
Keyword(s):  
Propylene Oxide ◽  
Poly Propylene

NMR study of a poly(propylene oxide)-NaCF3SO3 polymer electrolyte

1990 ◽  
Vol 40-41 ◽  
pp. 645-647 ◽  
Author(s):  
S SCHANTZ ◽  
M KAKIHANA ◽  
M SANDBERG
Keyword(s):  
Polymer Electrolyte ◽  
Propylene Oxide ◽  
Nmr Study ◽  
Poly Propylene
Sign in / Sign up

Export Citation Format

Share Document