Thermal molecular motion at surface of atactic polypropylene films

Atsushi Sakai, Keiji Tanaka, Tisato Kajiyama, Atsushi Takahara

研究成果: ジャーナルへの寄稿記事

5 引用 (Scopus)

抄録

Surface molecular motion in atactic polypropylene (aPP) films was studied by scanning force microscopy. Glass transition temperature at the surface, Tg c, was determined to be 251 ± 1 K on the basis of temperature dependence of lateral force, whereas its bulk glass transition temperature, Tg b, by dynamic viscoelastic and differential scanning calorimetric measurements was 262 K. In general, polyolefin is easily oxidized, and thus, many kinds of additives are mixed in it for practical use. Hence, effects of oxidation and additives on surface properties of the aPP surface were examined as well. To achieve oxidation, the aPP films were annealed at 428 K for 100 min under the ambient atmosphere. After this treatment, Tg c decreased by approximately 15 K in comparison with the intact film due to degradation of surface chains. On the contrary, in the case of the aPP containing 10 wt% antioxidant, Tg c was almost the same as that of the intact film before and even after the oxidation treatment.

元の言語英語
ページ(範囲)5109-5115
ページ数7
ジャーナルpolymer
43
発行部数19
DOI
出版物ステータス出版済み - 8 2 2002

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Polypropylenes
Oxidation
Polyolefins
Antioxidants
Surface properties
Atomic force microscopy
Scanning
Degradation
Hot Temperature
Temperature
Glass transition temperature

All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

これを引用

Thermal molecular motion at surface of atactic polypropylene films. / Sakai, Atsushi; Tanaka, Keiji; Kajiyama, Tisato; Takahara, Atsushi.

:: polymer, 巻 43, 番号 19, 02.08.2002, p. 5109-5115.

研究成果: ジャーナルへの寄稿記事

Sakai, Atsushi ; Tanaka, Keiji ; Kajiyama, Tisato ; Takahara, Atsushi. / Thermal molecular motion at surface of atactic polypropylene films. :: polymer. 2002 ; 巻 43, 番号 19. pp. 5109-5115.
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abstract = "Surface molecular motion in atactic polypropylene (aPP) films was studied by scanning force microscopy. Glass transition temperature at the surface, Tg c, was determined to be 251 ± 1 K on the basis of temperature dependence of lateral force, whereas its bulk glass transition temperature, Tg b, by dynamic viscoelastic and differential scanning calorimetric measurements was 262 K. In general, polyolefin is easily oxidized, and thus, many kinds of additives are mixed in it for practical use. Hence, effects of oxidation and additives on surface properties of the aPP surface were examined as well. To achieve oxidation, the aPP films were annealed at 428 K for 100 min under the ambient atmosphere. After this treatment, Tg c decreased by approximately 15 K in comparison with the intact film due to degradation of surface chains. On the contrary, in the case of the aPP containing 10 wt{\%} antioxidant, Tg c was almost the same as that of the intact film before and even after the oxidation treatment.",
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N2 - Surface molecular motion in atactic polypropylene (aPP) films was studied by scanning force microscopy. Glass transition temperature at the surface, Tg c, was determined to be 251 ± 1 K on the basis of temperature dependence of lateral force, whereas its bulk glass transition temperature, Tg b, by dynamic viscoelastic and differential scanning calorimetric measurements was 262 K. In general, polyolefin is easily oxidized, and thus, many kinds of additives are mixed in it for practical use. Hence, effects of oxidation and additives on surface properties of the aPP surface were examined as well. To achieve oxidation, the aPP films were annealed at 428 K for 100 min under the ambient atmosphere. After this treatment, Tg c decreased by approximately 15 K in comparison with the intact film due to degradation of surface chains. On the contrary, in the case of the aPP containing 10 wt% antioxidant, Tg c was almost the same as that of the intact film before and even after the oxidation treatment.

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