𝔖 Bobbio Scriptorium
✦   LIBER   ✦

The investigation of chemically crosslinked polypropylene by spin-lattice relaxation time

✍ Scribed by Kunert, K. A. ;Jurkiewicz, A. ;Piślewski, N.

Book ID
105334560
Publisher
John Wiley and Sons
Year
1983
Weight
351 KB
Volume
21
Category
Article
ISSN
0360-6376

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Our previous NMR investigations of chemically crosslinked polypropylene (PP) were focused mainly on testing the relation between NMR relaxation times as a function of crosslinking compound concentrations and the influence of structural factors found by this method on mechanical and other properties of this polymer.^1,2^ In these investigations, however, we did not consider the state of mobility of any part of the polypropylene chain under the influence of the network; therefore in this article we have attempted a clarification of this problem.

📜 SIMILAR VOLUMES

Temperature dependence of proton spin-la
Temperature dependence of proton spin-lattice and spin-spin relaxation times in isotactic polypropylene. Effect of annealing
✍ Hiroshi Tanaka; Fumie Kohrogi; Kazuhiko Suzuki 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 356 KB

The temperature dependences of the proton spin-lattice, Tt, and spin-spin, T2, relaxation times of isotactic polypropylene films with different thermal histories and atactic fraction were investigated. A T~ minimum occurs for both melt-quenched and annealed samples at about 70°C. It shifts to lower

Temperature dependence of proton spin-la
Temperature dependence of proton spin-lattice and spin-spin relaxation times of highly stretched isotactic polypropylene film
✍ Hiroshi Tanaka; Kiyohide Takagi 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 309 KB

Proton spin-lattice, T~, and spin-spin, T 2, relaxation times of highly stretched isotactic polypropylene film were measured in the temperature range 40-110°C. There is a monotonical increase in T~, when measured at 40°C, as the stretching ratio is increased. A shorter T I, Tis, was observed for all