Results 181 to 190 of about 3,611 (217)
Some of the next articles are maybe not open access.
Polyurethane based on hydroxyl‐terminated polybutadienes
British Polymer Journal, 1971AbstractButadiene has been found to homopolymerise and copolymerise with other reactive vinyl monomers to yield unique liquid polymers which are terminated with reactive allylic hydroxyl groups. Through the use of an isocyanate cure reaction they offer a route to liquid castable general purpose elastomers, capable of reinforcement with various fillers ...
openaire +1 more source
Studies on Hydroxyl Terminated Polybutadiene Toughened Phenolic Resin
High Performance Polymers, 2006Phenolic novolac was modified with hydroxyl terminated polybutadiene (HTPB) using resole as compatibilizer. These systems were characterized by differential scanning calorimetry, and IR analysis. Neat resin castings were prepared with varying percentages of HTPB.
C. Nirmal +4 more
openaire +1 more source
Combinations of hydroxyl‐terminated polybutadiene and boron
Journal of Polymer Science: Polymer Chemistry Edition, 1985AbstractMixing and curing experiments with suspensions of boron in hydroxyl‐terminated polybutadiene (HTPB) have been performed. In kneading experiments on a plastograph very high viscous masses with bad curing properties were obtained. The experiments indicated that HTPB is attached with its OH groups to acidic impurities on the surface of the boron ...
openaire +1 more source
Urethane Elastomers Based on Hydroxyl Terminated Polybutadienes
Journal of Elastoplastics, 1971This article describes the preparation and properties of urethane elastomers based on hydroxyl-terminated polybutadienes. The liquid nature of these polybutadiene systems allows easy reaction with isocyanates even at ambient temperatures. Properties of elastomers produced can be easily improved by either chemical modification of the polymer backbone ...
openaire +1 more source
Catalysis of Blocked Isocyanate-Hydroxyl-Terminated Polybutadiene Cure Reaction
Journal of Macromolecular Science, Part A, 1996The catalytic activity of three tertiary amines and three organotin compounds in the cure reaction of blocked isocyanate with hydroxyl-terminated polybutadiene was investigated. It was found that the steric factor determines the catalytic activity of the compound. The tin compounds showed higher catalytic activities than the amine compounds.
H. Kothandaraman +2 more
openaire +1 more source
Azo initiators for the preparation of hydroxyl‐terminated polybutadienes
Journal of Polymer Science: Polymer Chemistry Edition, 1983AbstractAzo compounds such as di(4‐hydroxybutyl)‐2,2′‐azobisisobutyrate, di(3‐hydroxybutyl)‐2,2′‐azobisisobutyrate, di(2‐hydroxypropyl)‐2,2′‐azobisisobutyrate, and di(2‐hydroxyethyl)‐2,2′‐azobisisobutyrate were prepared and used as initiators for the preparation of hydroxyl‐terminated polybutadienes (HTPBs) of molecular weight (M̄n) ranging from 2000 ...
B. B. Idage +2 more
openaire +1 more source
Viscoelastic behavior of hydroxyl terminated polybutadiene containing glycerin
Journal of Applied Polymer Science, 2011AbstractHydroxyl terminated polybutadiene (HTPB) is widely used as a propellant binder. A plasticizer is usually added to improve the processing properties, the mechanical properties, and the burning characteristics of the propellant. Glycerin was found to be an effective additive to improve these properties.
openaire +1 more source
Tensile property of modified hydroxyl-terminated polybutadiene-based polyurethanes
Journal of Applied Polymer Science, 1997Modified hydroxyl-terminated polybutadiene (HTPB)-based polyurethanes (PUs) were prepared by three different processes: crosslinkage of the soft segment, complexation of the hard segment, and the interpenetrating network (IPN). Crosslinked PU films were prepared by the addition of a crosslinking agent of divinylbenzene (DVB) to the 4,4 ...
Shih-Liang Huang, Juin-Yir Lai
openaire +1 more source
Functionality distribution and crosslink density of hydroxyl‐terminated polybutadiene
Polymer International, 1993Abstract A novel approach is proposed for estimating the average molecular weight between crosslinks (M̄ c ) from the functionality distribution of hydroxyl‐terminated polybutadiene ( HTPB ). The functionality distribution of four free‐
K. N. Ninan +3 more
openaire +1 more source
Chitin based polyurethanes using hydroxyl terminated polybutadiene, Part II: Morphological studies
International Journal of Biological Macromolecules, 2013Chitin-hydroxyl terminated polybutadiene (HTPB) based polyurethane (PU) was prepared and structure of the pre-designed PU was confirmed using FT-IR spectrometer. The FT-IR analysis confirmed that the crosslinking density increased with increasing the chitin contents in the final PU.
Khalid Mahmood, Zia +4 more
openaire +2 more sources