Synthesis and physical characterization of semi-IPNs of linear polyurethane and heterocyclic polymer network.(5th International Conference on Polymer ... article from: Polymer Engineering and Science
Book Details
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB00098R6VE
ISBN-13978B00098R6V1
MarketplaceFrance 🇫🇷
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on March 1, 1999. The length of the article is 2980 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: Semi-interpenetrating polymer networks (semi-IPN) of linear polyurethane (LPU) and heterocyclic polymer network (HPN) were characterized by IR spectroscopy, small-angle X-ray scattering, differential calorimetry with diathermal shells (temperature interval 130-500 K), and dynamic mechanical analysis (temperature interval 150-500 K and frequency range 0.3-30 Hz). The main results obtained may be summarized as follows: 1) The affinity of HPN towards the soft LPU microphase is responsible for the absence of large-scale heterogeneity of semi-IPNs on their base (at least, at low HPN/LPU ratios). 2) Phenomenological analysis of small-scale, Arrhenius-like subglass relaxations ([[Lambda].sub.1] and [[Lambda].sub.2] in LPU and in HPN, respectively) revealed lithe interference of HPN with relaxation centers (RCs) of LPU in semi-IPNs, while the local environment of RCs in HPN, on the contrary, strongly depended on semi-IPN composition.
Citation Details
Title: Synthesis and physical characterization of semi-IPNs of linear polyurethane and heterocyclic polymer network.(5th International Conference on Polymer Characterization)(semi-interpenetrating polymer networks)
Author: Antonino Bartolotta
Publication:Polymer Engineering and Science (Refereed)
Date: March 1, 1999
Publisher: Society of Plastics Engineers, Inc.
Volume: 39 Issue: 3 Page: 549(1)
Distributed by Thomson Gale
From the author: Semi-interpenetrating polymer networks (semi-IPN) of linear polyurethane (LPU) and heterocyclic polymer network (HPN) were characterized by IR spectroscopy, small-angle X-ray scattering, differential calorimetry with diathermal shells (temperature interval 130-500 K), and dynamic mechanical analysis (temperature interval 150-500 K and frequency range 0.3-30 Hz). The main results obtained may be summarized as follows: 1) The affinity of HPN towards the soft LPU microphase is responsible for the absence of large-scale heterogeneity of semi-IPNs on their base (at least, at low HPN/LPU ratios). 2) Phenomenological analysis of small-scale, Arrhenius-like subglass relaxations ([[Lambda].sub.1] and [[Lambda].sub.2] in LPU and in HPN, respectively) revealed lithe interference of HPN with relaxation centers (RCs) of LPU in semi-IPNs, while the local environment of RCs in HPN, on the contrary, strongly depended on semi-IPN composition.
Citation Details
Title: Synthesis and physical characterization of semi-IPNs of linear polyurethane and heterocyclic polymer network.(5th International Conference on Polymer Characterization)(semi-interpenetrating polymer networks)
Author: Antonino Bartolotta
Publication:Polymer Engineering and Science (Refereed)
Date: March 1, 1999
Publisher: Society of Plastics Engineers, Inc.
Volume: 39 Issue: 3 Page: 549(1)
Distributed by Thomson Gale
