In situ polymerization of bisphenol-A-carbonate cyclic oligomers in miscible blends with a styrene-acrylonitrile copolymer: phase separation dynamics and the influence of phase dispersion on ductility

Polymer ◽  
1994 ◽  
Vol 35 (17) ◽  
pp. 3643-3657 ◽  
Author(s):  
Warren L. Nachlis ◽  
Roger P. Kambour ◽  
William J. MacKnight
Keyword(s):  
Phase Separation ◽  
Bisphenol A ◽  
In Situ Polymerization ◽  
Acrylonitrile Copolymer ◽  
Phase Dispersion ◽  
Miscible Blends ◽  
Cyclic Oligomers ◽  
Styrene Acrylonitrile

ON THE CYCLO-DEPOLYMERIZATION OF ALKYL AROMATIC POLYESTERS AND THE IN SITU POLYMERIZATION OF THE CYCLIC OLIGOMERS PRODUCED

2008 ◽  
Author(s):  
M. Alessi ◽  
P. Stagnaro ◽  
L. Conzatti ◽  
S. Tagliatatela Scafati ◽  
P. Hodge ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Cyclic Oligomers ◽  
Aromatic Polyesters

Mechanical Properties of Thermoplastic Composites via In Situ Polymerization from Cyclic Oligomers

2013 ◽  
Vol 750-752 ◽  
pp. 7-10
Author(s):  
Kou An Hao ◽  
Zhen Qing Wang ◽  
Li Min Zhou
Keyword(s):  
Mechanical Properties ◽  
In Situ Polymerization ◽  
High Viscosity ◽  
Thermoplastic Composites ◽  
Thermoplastic Matrix ◽  
Polymerization Catalyst ◽  
Short Beam ◽  
Beam Shear ◽  
Cyclic Oligomers

Fiber impregnation has been the main obstacle for thermoplastic matrix with high viscosity. This problem could be surmounted by adapting low viscous polymeric precursors Woven basalt fabric reinforced poly (butylenes terephthalate) composites were produced via in-situ polymerization at T=210°C. Before polymerization, catalyst was introduced to the reinforcement surface with different concentration. DSC is used to determine the polymerization and crystallization. SEM is used to detect whether the catalyst existed on surface. Both flexural and short-beam shear test are employed to study the corresponding mechanical properties.

Research on Performance of Polyimide In Situ Modification Anionic Polymerization Nylon 6

2014 ◽  
Vol 1052 ◽  
pp. 242-248
Author(s):  
Hong Kai Zhao ◽  
Hong Li Wang
Keyword(s):  
Bisphenol A ◽  
Water Absorption ◽  
In Situ Polymerization ◽  
Microscopic Analysis ◽  
Nylon 6 ◽  
Grafting Reaction ◽  
Lamellar Crystals ◽  
End Capping ◽  
Short Time

Through the polymerization and grafting reaction of bisphenol A dianhydride and bisphenol A diamine, the polyimide activator (PI activator) of acyl caprolactam end capping is obtained and then the anionic in-situ polymerization modified nylon 6 resin is obtained. Viscosity analysis shows that PI consumption is higher than 0.1 (of monomer mass), the reaction temperature is higher than 160°C, the viscosity rises rapidly in a short time and the rapid polymerization molding can be realized; when PI consumption is higher than 0.15 (of monomer mass), the water absorption of matrix resin will be lower than 1.4%; compared with the nylon resin, its water absorption is significantly lowered and its mechanical property is improved greatly; microscopic analysis shows that PI molecules fail to enter the crystalline phase of the nylon 6 and form lamellar crystals in the nylon matrix, which plays a role of enhancement and obstruction; differential thermal analysis shows that PI reduces the melting enthalpy and melting point temperature of nylon 6 resin, which indicates that PI reduces the crystallization capacity of nylon 6.

Nanometric Surface Patterns for Tissue Engineering: Fabrication and Biocompatibility in Vitro

2001 ◽  
Vol 705 ◽  
Author(s):  
M Riehle ◽  
M Dalby ◽  
H Johnstone ◽  
J Gallagher ◽  
M A Wood ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Phase Separation ◽  
In Situ Polymerization ◽  
Fused Silica ◽  
Surface Features ◽  
Binary Polymer ◽  
Surface Patterns ◽  
Poly Caprolactone

AbstractThree fundamentally different methods were used to fabricate nanometric surface features on polymers or fused silica. Phase separation of binary polymer mixes resulted in randomly distributed features whose depth and shape could be tightly controlled over large areas. Colloidal resist patterned large areas randomly and uniformly with very fine spikes. In contrast e-beam and reactive ion etching were used to create a set of regular spaced pillars on an orthogonal pattern. Some of the surfaces were replicated by in situ polymerization, solvent casting, embossing or melt molding onto polystyrene (PS) or ε–poly caprolactone (ε–PCL). Nanometric features down to 60nm were imprinted onto the polymers with high fidelity. Cells were seeded onto the nanometric surfaces and adhesion, morphology and cytoskeleton investigated. Cells respond to regular features of 170/80nm (width/depth) with reduced adhesion and changes in overall morphology and cytoskeleton. Small nanofeatures (13nm, 35nm depth) made by phase separation on the other hand increased adhesion and promoted cytoskeletal differentiation. The responses of the cells are indicative that nanometric surface features are useful modifications on scaffolds for tissue engineering or on medical implants.

Preparation, characterization, and properties of graphene-based composite aerogels via in situ polymerization and three-dimensional self-assembly from graphene oxide solution

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 78538-78547 ◽  
Author(s):  
Haiming Cheng ◽  
Huafei Xue ◽  
Guangdong Zhao ◽  
Changqing Hong ◽  
Xinghong Zhang
Keyword(s):  
Graphene Oxide ◽  
Phase Separation ◽  
Self Assembly ◽  
In Situ Polymerization ◽  
Three Dimensional ◽  
One Pot ◽  
Hierarchical Porous ◽  
Composite Aerogels ◽  
Polymerization Induced Phase Separation

In this work, hierarchical porous graphene-based composite aerogels are synthesized by a simple and facile one-pot polymerization-induced phase separation.

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