GPC and Structural Analysis of Polyurethane Degradation (Record no. 45222)

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control field 20250625140642.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-10994
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245 10 - TITLE STATEMENT
Title GPC and Structural Analysis of Polyurethane Degradation
490 0# - SERIES STATEMENT
Volume/sequential designation Polymer PhotoChemistry, 7(4), p.273-287, 1986
520 3# - SUMMARY, ETC.
Summary, etc. Linear polyurethane (PUR)prepolymers were synthesized starting from diphenylmethane-4,4'-diisocyanate (MDI)and polyester diol oligomers. Two different types of polyester diols were used: poly(ethylene adipate)(PEA)and poly(ethylene/butylene adipate)(PEBA). The effects of UV irradiation on the photooxidative degradation of prepared PUR prepolymer were studied. The changes in the chain lengths and their distribution as well as the changes in chemical structure were followed. The GPC results show that the photooxidative decomposition is followed by a decrease in molecular mass together with an increase in polydispersity. This indicates a very inhomogeneous degradation, which is a consequence of the specific course and of the intensity of photooxidative degradation. This was confirmed by means of comparative IR and NMR measurements. Conclusions on the difference in behaviour of the two different types of polyester diols used in PUR synthesis were discussed.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Rek, V.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Mencer, H. J.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Bravar, M.
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Uniform Resource Identifier <a href="https://drive.google.com/file/d/1ER2MQOda_h5c9h8mjdpI15pd_VdDILvH/view?usp=drivesdk">https://drive.google.com/file/d/1ER2MQOda_h5c9h8mjdpI15pd_VdDILvH/view?usp=drivesdk</a>
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-10994 25.06.2025 25.06.2025 Documentos solicitados