Sequence-length distribution in bulk and DMSO-derived acrylic acid/methylmethacrylate copolymers

1985 ◽  
Vol 23 (1) ◽  
pp. 125-129 ◽  
Author(s):  
Kieran I. Ekpenyong
Keyword(s):  
Acrylic Acid ◽  
Length Distribution ◽  
Sequence Length

Nonlinear Multiresponse Parameter Estimation Using Simplex Optimization Method

2015 ◽  
Vol 1105 ◽  
pp. 299-304
Author(s):  
A. Al Saleh Mohammad ◽  
A. Yussuf Abdirahman
Keyword(s):  
Probabilistic Models ◽  
Length Distribution ◽  
Simulated Data ◽  
Optimization Method ◽  
Sequence Length ◽  
Distribution Data ◽  
Multiple Site ◽  
First Order ◽  
Site Type ◽  
Market Requirements

Polyolefin molecular architectures are designed according to customer needs and demands. Hence, it is essential to determine the catalytic behavior that gives the polymer the characteristics it needs to meet the market requirements. Today most of the industrial polyolefin production depends on multiple-site-type catalysts such as Ziegler-Natta catalysts. In this work a methodology to estimate parameters for polyolefin multiple-site-type catalysts was presented. The sequence length distribution data were simulated using Zeroth-order and First-order Markovian models. These simulated data were used to test the robustness of the optimization method. The optimization method used was able to retrieve and comprehend the proper probabilistic models and provide acceptable polymerization parameters estimates.

Quantitative Determination of the Microstructure and Composition of Crosslinked Rubber Blends

1997 ◽  
Vol 70 (2) ◽  
pp. 222-230 ◽  
Author(s):  
Emma Thorn-Csányi ◽  
Hans-Detlef Luginsland
Keyword(s):  
Carbon Black ◽  
Quantitative Determination ◽  
Length Distribution ◽  
Polymer Degradation ◽  
Mineral Oil ◽  
Sequence Length ◽  
Analytic Method ◽  
Rubber Blends ◽  
Different Types

Abstract Intermolecular metathetic polymer degradation opens up an analytic method to identify the quality and quantity of the components in blends of different types of rubber even if they are crosslinked and filled with carbon black, mineral oil, etc.. Furthermore the amount of soluble and insoluble additives can be determined. Moreover, metathetic degradation allows for determination of detailed information about the chemical microstructure (e.g. sequence length distribution of 1,2-butadiene and styrene units) of the rubbers used. This method is suitable for analysis of rubber components in tires.

Experimental Determination of Sequence Length Distribution of Hard Segments in Polyester-Polyurethanes

1994 ◽  
Vol 27 (26) ◽  
pp. 7650-7653 ◽  
Author(s):  
M. F. Barreiro ◽  
R. C. S. Dias ◽  
M. R. N. Costa
Keyword(s):  
Experimental Determination ◽  
Length Distribution ◽  
Sequence Length ◽  
Hard Segments

Effects of sequence length distribution on heat capacity and glass transition temperature of styrene—methyl methacrylate copolymers

Polymer ◽  
1994 ◽  
Vol 35 (17) ◽  
pp. 3698-3702 ◽  
Author(s):  
Hidematsu Suzuki ◽  
Yoshiyuki Nishio ◽  
Noritaka Kimura ◽  
V.B.F. Mathot ◽  
M.F.J. Pijpers ◽  
...  
Keyword(s):  
Heat Capacity ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Methyl Methacrylate ◽  
Length Distribution ◽  
Sequence Length ◽  
Methacrylate Copolymers

Modeling of sequence length distribution for olefin copolymerization with vanadium‐based catalyst

AIChE Journal ◽  
2019 ◽  
Vol 66 (1) ◽  
Author(s):  
Xi‐Pei Cheng ◽  
Lian‐Fang Feng ◽  
Xue‐Ping Gu ◽  
Xi Chen ◽  
Zhen‐Guo Liu ◽  
...  
Keyword(s):  
Length Distribution ◽  
Sequence Length
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