A study of the glass transition of polypropylene surfaces by sum-frequency vibrational spectroscopy and scanning force microscopy

D. H. Gracias; D. Zhang; L. Lianos; W. Ibach; Y. R. Shen; G. A. Somorjai

doi:10.1016/S0301-0104(99)00043-9

A study of the glass transition of polypropylene surfaces by sum-frequency vibrational spectroscopy and scanning force microscopy

D. H. Gracias
, D. Zhang
, L. Lianos
, W. Ibach
, Y. R. Shen
, G. A. Somorjai

Research output: Contribution to journal › Article › peer-review

Abstract

Sum-frequency generation (SFG) vibrational spectroscopy and scanning force microscopy (SFM) were used to probe structural changes of atactic polypropylene (APP) and isotactic polypropylene (IPP) surfaces in the glass transition. The results indicate that below the glass transition, the surface polymer chains are better oriented with the CH₂ groups pointing outward and the surface elastic modulus is higher. The SFG and SFM results correlate well in the transition towards the glass phase. No discernible difference between the glass transition temperatures of the bulk and surface was observed.

Original language	English (US)
Pages (from-to)	277-284
Number of pages	8
Journal	Chemical Physics
Volume	245
Issue number	1-3
DOIs	https://doi.org/10.1016/S0301-0104(99)00043-9
State	Published - Jul 1 1999
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy
Physical and Theoretical Chemistry

Access to Document

10.1016/S0301-0104(99)00043-9

Cite this

@article{410fe87f8ad74dcc8436a3146b0f91d1,

title = "A study of the glass transition of polypropylene surfaces by sum-frequency vibrational spectroscopy and scanning force microscopy",

abstract = "Sum-frequency generation (SFG) vibrational spectroscopy and scanning force microscopy (SFM) were used to probe structural changes of atactic polypropylene (APP) and isotactic polypropylene (IPP) surfaces in the glass transition. The results indicate that below the glass transition, the surface polymer chains are better oriented with the CH2 groups pointing outward and the surface elastic modulus is higher. The SFG and SFM results correlate well in the transition towards the glass phase. No discernible difference between the glass transition temperatures of the bulk and surface was observed.",

author = "Gracias, \{D. H.\} and D. Zhang and L. Lianos and W. Ibach and Shen, \{Y. R.\} and Somorjai, \{G. A.\}",

note = "Funding Information: This work was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences Division, of the U.S. Department of Energy under contract number DE-AC0376SF00098. ",

year = "1999",

month = jul,

day = "1",

doi = "10.1016/S0301-0104(99)00043-9",

language = "English (US)",

volume = "245",

pages = "277--284",

journal = "Chemical Physics",

issn = "0301-0104",

publisher = "Elsevier B.V.",

number = "1-3",

}

TY - JOUR

T1 - A study of the glass transition of polypropylene surfaces by sum-frequency vibrational spectroscopy and scanning force microscopy

AU - Gracias, D. H.

AU - Zhang, D.

AU - Lianos, L.

AU - Ibach, W.

AU - Shen, Y. R.

AU - Somorjai, G. A.

N1 - Funding Information: This work was supported by the Director, Office of Energy Research, Office of Basic Energy Sciences, Materials Sciences Division, of the U.S. Department of Energy under contract number DE-AC0376SF00098.

PY - 1999/7/1

Y1 - 1999/7/1

N2 - Sum-frequency generation (SFG) vibrational spectroscopy and scanning force microscopy (SFM) were used to probe structural changes of atactic polypropylene (APP) and isotactic polypropylene (IPP) surfaces in the glass transition. The results indicate that below the glass transition, the surface polymer chains are better oriented with the CH2 groups pointing outward and the surface elastic modulus is higher. The SFG and SFM results correlate well in the transition towards the glass phase. No discernible difference between the glass transition temperatures of the bulk and surface was observed.

AB - Sum-frequency generation (SFG) vibrational spectroscopy and scanning force microscopy (SFM) were used to probe structural changes of atactic polypropylene (APP) and isotactic polypropylene (IPP) surfaces in the glass transition. The results indicate that below the glass transition, the surface polymer chains are better oriented with the CH2 groups pointing outward and the surface elastic modulus is higher. The SFG and SFM results correlate well in the transition towards the glass phase. No discernible difference between the glass transition temperatures of the bulk and surface was observed.

UR - https://www.scopus.com/pages/publications/0033464327

UR - https://www.scopus.com/pages/publications/0033464327#tab=citedBy

U2 - 10.1016/S0301-0104(99)00043-9

DO - 10.1016/S0301-0104(99)00043-9

M3 - Article

AN - SCOPUS:0033464327

SN - 0301-0104

VL - 245

SP - 277

EP - 284

JO - Chemical Physics

JF - Chemical Physics

IS - 1-3

ER -

A study of the glass transition of polypropylene surfaces by sum-frequency vibrational spectroscopy and scanning force microscopy

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this