Synthesis and characterization of chemically modified polystyrene as processable carbon fiber precursors

2010 ◽  
Vol 36 (6-7) ◽  
pp. 621-627 ◽  
Author(s):  
Ki-Ho Jung ◽  
Joon-Hyung Byun ◽  
Young-Seak Lee ◽  
Soo-Jin Park
Polymer ◽  
2002 ◽  
Vol 43 (18) ◽  
pp. 4841-4850 ◽  
Author(s):  
V.A Bhanu ◽  
P Rangarajan ◽  
K Wiles ◽  
M Bortner ◽  
M Sankarpandian ◽  
...  

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 39771-39784 ◽  
Author(s):  
Balbir Singh Kaith ◽  
Jitender Dhiman ◽  
Jaspreet Kaur Bhatia

Poly(HEMA) chain grafted chemically modified Holarrhena antidysenterica fiber was converted into a cation-exchanger using phosphorylation and p-doping technique.


2013 ◽  
Vol 49 (2) ◽  
pp. 285-292 ◽  
Author(s):  
Mangesh Bhalekar ◽  
Savita Sonawane ◽  
Shamkant Shimpi

The aim of this study was to improve the mucoadhesive potential of xyloglucan polymer by the covalent attachment of cysteine as thiol moiety. The parent polymer xyloglucan was chemically modified by introducing sulphydryl bearing compound L-cysteine HCl. Different batches of xyloglucan-cysteine conjugates were prepared at varying reaction pH (2-6) and evaluated for optimum thiol incorporation, disulphide group content, swelling behavior, rheological properties and mucoadhesive properties. The obtained conjugates characterized in vitro by quantification of immobilized thiol groups; showed maximum thiol incorporation on xyloglucan (7.67 ± 0.14 %) at pH 5. The disulphide group content was found maximum (2.83 ± 0.12) at pH 6. The water uptake at end of 4 h was 5.0 for xyloglucan and was found to decrease in thiolated derivatives with increase in thiolation. Mucoadhesion studies revealed that mucoadhesion of xyloglucan-cysteine conjugate increased more than twice compared to the unmodified polymer. The viscosity of thiomer was more than that of xyloglucan because of formation of disulphide bonds.


1997 ◽  
Vol 33 (3) ◽  
pp. 291-294 ◽  
Author(s):  
YU CHEN ◽  
ZU-EN HUANG ◽  
RUI-FANG CAI ◽  
BO-CHENG YU ◽  
WEIWEN MA ◽  
...  

2003 ◽  
Vol 16 (1) ◽  
pp. 32-35
Author(s):  
Constantin Măruţoiu ◽  
Cristian Tigae ◽  
Maria-Ioana Moise ◽  
Alexandru Popescu ◽  
Iuliana Ilea

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