Synthesis of linear, high-molecular-weight aromatic polyamides by the palladium-catalyzed carbonylation and condensation of aromatic diiodides, diamines, and carbon monoxide

1993 ◽  
Vol 26 (7) ◽  
pp. 1509-1513 ◽  
Author(s):  
Robert J. Perry ◽  
S. Richard Turner ◽  
Richard W. Blevins
Keyword(s):  
Molecular Weight ◽  
Carbon Monoxide ◽  
High Molecular Weight ◽  
Aromatic Polyamides ◽  
Palladium Catalyzed

Semi-bio-based aromatic polyamides from 2,5-furandicarboxylic acid: toward high-performance polymers from renewable resources

RSC Advances ◽  
2016 ◽  
Vol 6 (90) ◽  
pp. 87013-87020 ◽  
Author(s):  
Kaiju Luo ◽  
Yan Wang ◽  
Junrong Yu ◽  
Jing Zhu ◽  
Zuming Hu
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Molecular Weight ◽  
High Molecular Weight ◽  
Renewable Resources ◽  
High Performance ◽  
Good Thermal Stability ◽  
Aromatic Polyamides ◽  
High Performance Polymers ◽  
Furandicarboxylic Acid

Aromatic furanic polyamides with relatively high molecular weight were synthesized, and good thermal stability and mechanical properties were demonstrated.

High-molecular-weight aromatic polyamides by direct polycondensation

1993 ◽  
Vol 26 (18) ◽  
pp. 4984-4985 ◽  
Author(s):  
Saverio Russo ◽  
Alberto Mariani ◽  
Vladimir N. Ignatov ◽  
Igor I. Ponomarev
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Direct Polycondensation ◽  
Aromatic Polyamides

High molecular weight aromatic polyamides from aromatic diiodides and diamines

1992 ◽  
Vol 25 (18) ◽  
pp. 4819-4820 ◽  
Author(s):  
S. Richard Turner ◽  
Robert J. Perry ◽  
Richard W. Blevins
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Aromatic Polyamides

Studies on Influencing Factors of Polyketone Molecular Weight by Palladium Catalyzed Alternating Copolymerization with Carbon Monoxide and Ethylene

2013 ◽  
Vol 634-638 ◽  
pp. 2014-2018
Author(s):  
Jia Yao Du ◽  
Liang Chen ◽  
Wen Wei ◽  
Lin Deng ◽  
Ling Gao ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Carbon Monoxide ◽  
Water Content ◽  
Temperature Rise ◽  
Palladium Catalyzed ◽  
System Temperature ◽  
Main Factors ◽  
Increasing Temperature ◽  
Alternating Copolymerization ◽  
Strong Acids

With Pd(AcO)2DPPP as catalytic precursor of CO/C2H4 alternating copolymerization. The main factors which affect the molecular weight of polyketone were studied. The results showed that: Temperature was the most important factor in copolymerization. The polyketone molecular weight lower faster with increasing temperature, have a decrease of 53% when system temperature rise from 70°C to 80°C, and the palladium-catalyzed progenitor easy to decomposition and become deactivation. Adding pressure was in favor of the increase of copolymerization rate and molecular weight. Water content in methanol solvent was sensitive to copolymerization rate, as far as molecular weight was concerned, it made no difference. HClO4 and other strong acids in the catalytic system will help improve the molecular weight of the polyketone.

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