Reaction modeling of urethane polyols using fraction primary secondary and hindered-secondary hydroxyl content

2014 ◽  
Vol 131 (12) ◽  
pp. n/a-n/a ◽  
Author(s):  
Rima Ghoreishi ◽  
Yusheng Zhao ◽  
Galen J. Suppes
Keyword(s):  
Hydroxyl Content ◽  
Secondary Hydroxyl

scholarly journals Spectroscopic and Rheological Cross-Analysis of Polyester Polyol Cure Behavior: Role of Polyester Secondary Hydroxyl Content

ACS Omega ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 932-939 ◽  
Author(s):  
Joseph C. Tilly ◽  
Amulya K. Pervaje ◽  
David L. Inglefield ◽  
Erik E. Santiso ◽  
Richard J. Spontak ◽  
...  
Keyword(s):  
Hydroxyl Content ◽  
Polyester Polyol ◽  
Secondary Hydroxyl ◽  
Cure Behavior

ZnS enhancing the infrared emission of Er3+ doped oxyfluorosulfide glasses with low hydroxyl content

2021 ◽  
Vol 566 ◽  
pp. 120906
Author(s):  
Changfu Xu ◽  
Cheng Zheng ◽  
Jiaxin Li ◽  
Ying Liu ◽  
Lizhong Sun
Keyword(s):  
Infrared Emission ◽  
Hydroxyl Content

scholarly journals Application of Radiochemical Techniques to the Determination of the Hydroxyl Content of Some Sporopollenins

Grana ◽  
1970 ◽  
Vol 10 (3) ◽  
pp. 246-247 ◽  
Author(s):  
P. Fawcett ◽  
D. Green ◽  
R. Holleyhead ◽  
G. Shaw
Keyword(s):  
Hydroxyl Content

scholarly journals Stereoselective total syntheses of (±)-sinularene and (±)-5-epi-sinularene: a general intramolecular Diels–Alder approach to tricyclic sesquiterpenes

1985 ◽  
Vol 63 (4) ◽  
pp. 993-995 ◽  
Author(s):  
Kazimierz Antczak ◽  
John F. Kingston ◽  
Alex G. Fallis
Keyword(s):  
Double Bond ◽  
Methyl Ester ◽  
Total Synthesis ◽  
Ring System ◽  
Diels Alder ◽  
Exocyclic Double Bond ◽  
Total Syntheses ◽  
Methyl Group ◽  
Secondary Hydroxyl ◽  
Selective Hydrogenolysis

Stereoselective total synthesis of (±)-sinularene and (±)-5-epi-sinularene are described. The sequence employs a "blocked" cyclopentadiene in which the cyclopropane unit also serves as a latent methyl group. Thus intramolecular [4 + 2] cycloaddition of the substituted methyl spiro[2.4]hepta-4,6-dien-1-yl)-2-pentenoate 11 affords 5-benzyloxy-6-isopropyl-8-carbomethoxytetracyclo[5.4.01,7.02,4.02,9]undec-10-ene (12) which after selective hydrogenolysis generates the tricyclo[4.4.01,6.02,8]decane (sinularene) ring system. Removal of the secondary hydroxyl function (Ph3P/CCl4/CH3CN; H2/Pd/C), reduction of the methyl ester (LiAlH4), and introduction of the exocyclic double bond (acetate pyrolysis, 550 °C) completes the synthesis of (±)-sinularene in 14 steps from cyclopentadiene. A parallel series of reactions employing the isopropyl epimer of 12 affords (±)-5-epi-sinularene.

Regioselectivity among six secondary hydroxyl groups: selective acylation of the least reactive hydroxyl groups of inositol

2012 ◽  
Vol 48 (18) ◽  
pp. 2448 ◽  
Author(s):  
Amol M. Vibhute ◽  
Adiyala Vidyasagar ◽  
Saritha Sarala ◽  
Kana M. Sureshan
Keyword(s):  
Hydroxyl Groups ◽  
Secondary Hydroxyl ◽  
Selective Acylation

FTIR Analysis of the Lignin Structure Changes of APMP Treated by Laccase and Laccase / Mediator System

2013 ◽  
Vol 734-737 ◽  
pp. 2089-2093
Author(s):  
Fan Liu ◽  
Yu Liu ◽  
Jia Chuan Chen ◽  
Zhen Wang
Keyword(s):  
Oxidative Degradation ◽  
No Oxidation ◽  
Side Chain ◽  
Content Increase ◽  
Hydroxyl Content ◽  
Structure Changes ◽  
Mediator System ◽  
Chromophoric Group ◽  
Laccase Mediator System ◽  
Lignin Structure

In this Paper the Two-Stage Method of Enzyme-Mild Acidic Hydrolysis was Adopted to Separate Lignin from the APMP and the Modified Pulp Samples.And then Analyze the Lignin Structure Changes of the Modified APMP Lignin by Laccase and LMS(laccase/mediator System). it was Found that no Oxidation Took Place on Carbohydrates in the LMS, and Lignin Cα Hydroxyl Oxidization Produce α Carbonyl and H2O2 Bleaching can also Oxidation of Lignin, make the Conjugate C = α Increase;the Syringyl Structure Hydroxyl Content Increase, the Lignin Structure Macromolecular Side Chain Fracturing; Laccase and LMS Oxidative Degradation Chromophoric Group Unsaturated C = O, which can Improve the Brightness of Pulp and Create Better Conditions for Unbleached Pulp.

Hydroxyl Content of BaTiO3 Nanoparticles with Varied Size

2013 ◽  
Vol 96 (9) ◽  
pp. 2987-2993 ◽  
Author(s):  
Jens Adam ◽  
Gabi Klein ◽  
Tobias Lehnert
Keyword(s):  
Hydroxyl Content ◽  
Varied Size ◽  
Batio3 Nanoparticles
Sign in / Sign up

Export Citation Format

Share Document