Model Filled Polymers .11. Synthesis of Uniformly Crosslinked Polystyrene Microbeads

1991 ◽  
Author(s):  
Zheng-You Ding ◽  
Shenmin Ma ◽  
Dennis Kriz ◽  
J. J. Aklonis ◽  
R. Salovey
Keyword(s):  
Filled Polymers ◽  
Crosslinked Polystyrene

Model filled polymers. IX. Synthesis of uniformly crosslinked polystyrene microbeads

1992 ◽  
Vol 30 (11) ◽  
pp. 1189-1194 ◽  
Author(s):  
Zheng-You Ding ◽  
Shenmin Ma ◽  
Dennis Kriz ◽  
J. J. Aklonis ◽  
R. Salovey
Keyword(s):  
Filled Polymers ◽  
Crosslinked Polystyrene

scholarly journals Studies on Ionically Crosslinked Polystyrene

1969 ◽  
Vol 26 (296) ◽  
pp. 873-882 ◽  
Author(s):  
Fumio Ide ◽  
Tsuneo Kodama ◽  
Akira Hasegawa ◽  
Osamu Yamamoto
Keyword(s):  
Crosslinked Polystyrene

Theory of formation of the structure of closed-pore gas-filled polymers by foaming

1988 ◽  
Vol 24 (2) ◽  
pp. 223-230
Author(s):  
M. I. Gandel'sman ◽  
R. V. Matveenko ◽  
V. P. Budtov
Keyword(s):  
Filled Polymers ◽  
Closed Pore

Migration and Settling of Particulates in Filled Epoxies

2003 ◽  
Author(s):  
Lisa Mondy ◽  
Rekha Rao ◽  
Eric Lindgren ◽  
Amy Sun ◽  
Robert Lagasse ◽  
...  
Keyword(s):  
Particle Concentration ◽  
Particle Migration ◽  
Polymerization Reaction ◽  
Temperature Dependent ◽  
Filled Polymers ◽  
Post Test ◽  
Manufacturing Applications ◽  
Microscopy Data ◽  
Suspension Model ◽  
Epoxy Systems

Manufacturing applications for filled polymers include encapsulation of microelectronics and injection molding of composite parts. Predictive tools for simulating these manufacturing processes require knowledge of time- and temperature-dependent rheology of the polymer as well as information about local particle concentration. The overall system rheology is highly dependent on the particle concentration. The local particle concentration can change due to gravity, convection and shear-induced migration. For the epoxy systems of interest, an extent of reaction can be used to track the degree of cure. We couple the curing model with a diffusive flux suspension model [Zhang and Acrivos 1994] to determine the particle migration. This results in a generalized Newtonian model that has viscosity as a function of temperature, cure and concentration. Using this model, we examine settling of the particulate phase in both flowing and quiescent curing systems. We focus on settling in molds and flow in wide-gap counter-rotating cylinders. The heat transfer, including the exothermic polymerization reaction, must be modeled to achieve accurate results. The model is validated with temperature measurements and post-test microscopy data. Particle concentration is determined with x-ray microfocus visualization or confocal microscopy. Agreement between the simulations and experimental results is fair.

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