Characterization of polyxylylenes with solid state {sup 13}C nuclear magnetic resonance spectroscopy

Conference · Thu Feb 01 04:00:00 EST 1996

OSTI ID:205023

Loy, D A; Assink, R A; Jamison, G M; McNamara, W F; Schneider, D A ^[1]; Prabakar, S ^[2]

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1. Sandia National Labs., Livermore, CA (United States)
2. New Mexico Univ., Albuquerque, NM (United States)

Polyxylylenes are thermoplastics used as encapsulants for electronic devices. Five polyxylylenes were prepared by pyrolysis of [2.2]paracyclophanes and characterized by solid state {sup 13}C NMR spectroscopy. The chemical shift data, in combination with interrupted decoupling experiments, allowed assignment of resonances to their carbon sources in the polymers. This confirmed the integrity of the xylylene building block in the polymers and is consistent with linear polymers. No crosslinking could be detected within the NMR sensitivity limits. Residual paracyclophane was detected by {sup 13}C CP MAS NMR spectroscopy in the polyxylylene samples prepared at room temperature; however discrete {sup 13}C resonances due to amorphous and crystalline phases in the polymers were not resolved.

• Research Organization: Sandia National Labs., Livermore, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 205023
• Report Number(s): SAND--96-0340C; CONF-960376--5; ON: DE96007419
• Country of Publication: United States
• Language: English

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