scholarly journals Biobased blends of poly(propylene carbonate) and poly(hydroxybutyrate‐co‐hydroxyvalerate): Fabrication and characterization

2016 ◽  
Vol 134 (5) ◽  
Author(s):  
Eugene Enriquez ◽  
Amar K. Mohanty ◽  
Manjusri Misra
Keyword(s):  
Propylene Carbonate ◽  
Fabrication And Characterization ◽  
Poly Propylene

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.

Poly(propylene carbonate): Insight into the Microstructure and Enantioselective Ring-Opening Mechanism

2012 ◽  
Vol 45 (21) ◽  
pp. 8604-8613 ◽  
Author(s):  
Khalifah A. Salmeia ◽  
Sergei Vagin ◽  
Carly E. Anderson ◽  
Bernhard Rieger
Keyword(s):  
Propylene Carbonate ◽  
Ring Opening ◽  
Poly Propylene ◽  
Insight Into

Preparation and properties of poly(propylene carbonate) and nanosized ZnO composite films for packaging applications

2011 ◽  
Vol 122 (2) ◽  
pp. 1101-1108 ◽  
Author(s):  
Jongchul Seo ◽  
Gwonyoung Jeon ◽  
EUi Sung Jang ◽  
Sher Bahadar Khan ◽  
Haksoo Han
Keyword(s):  
Propylene Carbonate ◽  
Composite Films ◽  
Poly Propylene ◽  
Nanosized Zno

Wool powder: An efficient additive to improve mechanical and thermal properties of poly(propylene carbonate)

2017 ◽  
Vol 153 ◽  
pp. 119-127 ◽  
Author(s):  
Haibo Chang ◽  
Qingshuo Li ◽  
Chaojiang Xu ◽  
Runming Li ◽  
Hongxia Wang ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Propylene Carbonate ◽  
Mechanical And Thermal Properties ◽  
Poly Propylene

Employing the Sirolimus-Eluting Poly (Propylene Carbonate) Mesh for the Prevention of Arteriovenous Graft Stenosis in Rats

2018 ◽  
Vol 24 (3) ◽  
pp. 269-277 ◽  
Author(s):  
Hourong Sun ◽  
Chuan-Zhen Liu ◽  
Chunxiao Liu ◽  
Mengmeng Tang ◽  
Guangqing Cao ◽  
...  
Keyword(s):  
Propylene Carbonate ◽  
Western Blotting ◽  
Matrix Metalloproteinase 2 ◽  
Nuclear Antigen ◽  
Boyden Chamber ◽  
Blank Group ◽  
Area Index ◽  
Graft Stenosis ◽  
Poly Propylene

Poly (propylene carbonate, PPC) is a new member of the aliphatic polyester family. An outstanding feature of PPC is that it produces mainly water and carbon dioxide when degraded in vivo, causing minimal side effects. This unique property together with excellent biocompatibility and biodegradability makes PPC a promising material for drug delivery. In this study, we explored the effect of the sirolimus (an inhibitor of cell growth)-eluting PPC mesh on graft stenosis and its possible mechanisms in a rat arteriovenous grafting model. The PPC mesh was prepared by electrospinning. A jugular vein to abdominal aortic autograft transplantation model was established in rats. The graft was then treated by wrapping with the drug mesh or the drug-free mesh or left untreated. Four weeks posttransplantation, neointima was measured with hematoxylin and eosin staining, matrix metalloproteinase-2 (MMP-2), and MMP-9, and proliferating cell nuclear antigen (PCNA) in the grafts were assayed by Western blotting and immunohistochemistry, respectively. In vitro rat aortic adventitial fibroblast cell (RAAFC) migration was assessed using the Boyden chamber assay, and phospho-mammalian target of rapamycin (mTOR) levels in RAAFCs were determined by Western blotting. Animals with the drug mesh had an intimal area index of 4.87% ± 0.98%, significantly lower than that of the blank group (14.21% ± 2.56%) or the PPC group (15.03% ± 2.35%, both P < .05). The sirolimus mesh markedly suppressed MMP-2 and MMP-9 expression, decreased PCNA-positive cell numbers, inhibited RAAFC migration, and reduced phospho-mTOR levels. Our data suggest that the sirolimus-eluting PPC mesh might be potentially applied for the management of grafting stenosis.

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