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

Migration of hydroxyl in secondary systems during solvolysis in acid solution

1977 ◽  
Vol 55 (21) ◽  
pp. 3774-3785 ◽  
Author(s):  
Robert C. Cathcart ◽  
John W. Bovenkamp ◽  
Robert Y. Moir ◽  
Robert A. B. Bannard ◽  
Alfred A. Casselman
Keyword(s):  
Acid Solution ◽  
Reverse Reaction ◽  
Secondary Hydroxyl ◽  
Secondary Systems ◽  
Acid Catalyzed ◽  
Decisive Evidence

A system of compounds has been prepared which is well adapted for displaying the role of trans vicinal, secondary hydroxyl in solvolysis. On methanolysis in acid solution, compounds 5, 7a, and 8a all gave the same products, 9a and 10a, and in practically the same proportions, suggesting that at least one intermediate was common to all three reactions. These intermediates were such that 7a and 8a were not interconverted during the solvolysis, a fact in support of 6 as a common intermediate. Several alternative explanations were shown to be untenable, largely by taking advantage of the remarkable differences between hydroxyl and methoxyl. The work provides the most decisive evidence available for the covalent participation of hydroxyl as a neighbor group in the solvolysis of secondary systems, and contributes also to the study of the reverse reaction, the acid-catalyzed scission of epoxides.

Thermomechanical and Free-Volume Properties of Polyester–Polyol Films for Coatings Applications: Role of Diol Composition

2019 ◽  
Vol 1 (9) ◽  
pp. 2398-2406 ◽  
Author(s):  
Joseph C. Tilly ◽  
Amulya K. Pervaje ◽  
David L. Inglefield ◽  
Andrew T. Detwiler ◽  
Erik E. Santiso ◽  
...  
Keyword(s):  
Free Volume ◽  
Polyester Polyol ◽  
Volume Properties

Study on an Aliphatic Polyurethane Laminating Adhesive Based on Castor Oil

2012 ◽  
Vol 262 ◽  
pp. 551-556 ◽  
Author(s):  
Shuang Lian Chen ◽  
Guang Xue Chen ◽  
Jiang Wen Liu
Keyword(s):  
Adhesion Strength ◽  
Castor Oil ◽  
Isophorone Diisocyanate ◽  
Polyurethane Adhesive ◽  
Hydroxyl Content ◽  
Polyester Polyol ◽  
Lower Viscosity ◽  
Enhanced Boiling ◽  
Polyether Polyol ◽  
Copolymerization Ratio

The first component of the Polyurethane adhesive was prepared with polyester polyol, polyether polyol ,castor oil and isophorone diisocyanate. And this component was mixed with the castor oil and its modified production to prepare a two-component solvent-free aliphatic polyurethane laminating adhesive. In this study, the influences of the copolymerization ratio of polyester/ether on viscosity, heat resistance, adhesion strength and boiling resistance were studied, as well as influences of castor oil and its modified production on curing speed and adhesion strength. The results showed that when proportion of polyether diol was 25% and castor oil was 50% of the total hydroxyl content of first component, the PU adhesive with lower viscosity, better reactivity and enhanced boiling resistance would be achieved. And with an appropriate amount of derivatives castor oil in second component, the curing speed and adhesion strength of the PU adhesive were significantly improved.

Role of dactinomycin in the improved survival of children with Wilms' tumor

JAMA ◽  
1966 ◽  
Vol 195 (12) ◽  
pp. 1005-1009 ◽  
Author(s):  
D. J. Fernbach
Keyword(s):  
Wilms Tumor

Role of the allergist in diagnosis and management of patients with uveitis

JAMA ◽  
1966 ◽  
Vol 195 (3) ◽  
pp. 167-172 ◽  
Author(s):  
T. E. Van Metre
Keyword(s):  
Diagnosis And Management

The power of norms to sway fused group members

2018 ◽  
Vol 41 ◽  
Author(s):  
Winnifred R. Louis ◽  
Craig McGarty ◽  
Emma F. Thomas ◽  
Catherine E. Amiot ◽  
Fathali M. Moghaddam
Keyword(s):  
Evolutionary Anthropology ◽  
Normative Systems ◽  
Violent Extremism ◽  
Identity Fusion ◽  
Group Members

AbstractWhitehouse adapts insights from evolutionary anthropology to interpret extreme self-sacrifice through the concept of identity fusion. The model neglects the role of normative systems in shaping behaviors, especially in relation to violent extremism. In peaceful groups, increasing fusion will actually decrease extremism. Groups collectively appraise threats and opportunities, actively debate action options, and rarely choose violence toward self or others.

Elaborating the role of reflection and individual differences in the study of folk-economic beliefs

2018 ◽  
Vol 41 ◽  
Author(s):  
Kevin Arceneaux
Keyword(s):  
Decision Making ◽  
Individual Differences ◽  
Cognitive Processes ◽  
Evolutionary History ◽  
Behavioral Responses ◽  
History Of ◽  
Economic Beliefs

AbstractIntuitions guide decision-making, and looking to the evolutionary history of humans illuminates why some behavioral responses are more intuitive than others. Yet a place remains for cognitive processes to second-guess intuitive responses – that is, to be reflective – and individual differences abound in automatic, intuitive processing as well.

The role of affect in feelings of obligation

2020 ◽  
Vol 43 ◽  
Author(s):  
Stefen Beeler-Duden ◽  
Meltem Yucel ◽  
Amrisha Vaish
Keyword(s):  
Positive Emotions ◽  
The Creation ◽  
Sense Of Obligation

Abstract Tomasello offers a compelling account of the emergence of humans’ sense of obligation. We suggest that more needs to be said about the role of affect in the creation of obligations. We also argue that positive emotions such as gratitude evolved to encourage individuals to fulfill cooperative obligations without the negative quality that Tomasello proposes is inherent in obligations.

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