New kinetic aspects on the mechanism of thermal oxidative degradation of polypropylenes with various tacticities

Nakatani, Hisayuki; Suzuki, Shoutarou; Tanaka, Torao; Terano, Minoru

doi:10.1016/j.polymer.2005.10.131

Cited by 46 publications

(27 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In our previous works [13,19], we have reported that TGA measurement is a useful method of studying the rate of thermal oxidative degradation. The weight change curves obtained by TGA are shown in figure 3.…”

Section: Resultsmentioning

confidence: 99%

“…In order to evaluate the degradation rate, in several samples, the durations of the induction period (t di ) were determined using the weight change curves obtained from the measurements at several constant temperatures (130, 135, 140 and 145 • C). The t di has been defined as the time (second) at the intersection of the tangent at the inflection point with the plateau line of the induction period [13,19]. The apparent activation energy ( E) was calculated from the Arrhenius plot of ln t di versus the reciprocal of temperature.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Degradation behavior of polymer blend of isotactic polypropylenes with and without unsaturated chain end group

Nakatani

Kurniawan

Taniike

et al. 2008

Science and Technology of Advanced Materials

Self Cite

View full text Add to dashboard Cite

In this work, the relationship between the unsaturated chain end group content and the thermal oxidative degradation rate was systematically studied with binary polymer blends of isotactic polypropylene (iPP) with and without the unsaturated chain end group. The iPPs with and without the unsaturated chain end group were synthesized by a metallocene catalyst in the absence of hydrogen and by a Ziegler catalyst in the presence of one, respectively. The thermal oxidative degradation rate of the binary iPP blends was estimated from the molecular weight and the apparent activation energy ( E), which were obtained through size exclusion chromatography (SEC) and thermogravimetric analysis (TGA) measurements, respectively. These values exhibited a negative correlation against the mole content of the unsaturated chain end group. The thermal oxidative degradation rate apparently depends on the content of the unsaturated chain end group. This tendency suggests that the unsaturated chain end acts as a radical initiator of the iPP degradation reaction.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Degradation behavior of polymer blend of isotactic polypropylenes with and without unsaturated chain end group

Nakatani

Kurniawan

Taniike

et al. 2008

Science and Technology of Advanced Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…According to some authors [42][43][44][45][46], the degradation may be described by the following reactions:…”

Section: Mechanism Of Pyrolysis Of Polypropenementioning

confidence: 99%

Non-isothermal degradation kinetics of filled with rise husk ash polypropene composites

Turmanova¹,

Genieva²,

Dimitrova³

et al. 2008

Express Polym. Lett.

284

132

View full text Add to dashboard Cite

“…The influence of tacticity on the degradation rate of iPP was studied by H. Nakatani et al [89], they found an increased oxidation rate with an increase in the meso pentad fraction.…”

Section: Effect Of Crystallinity and Stereoregularitymentioning

confidence: 99%

Review on the thermo-oxidative degradation of polymers during processing and in service

Gijsman

2008

E-Polymers

View full text Add to dashboard Cite

show abstract

New kinetic aspects on the mechanism of thermal oxidative degradation of polypropylenes with various tacticities

Cited by 46 publications

References 18 publications

Degradation behavior of polymer blend of isotactic polypropylenes with and without unsaturated chain end group

Degradation behavior of polymer blend of isotactic polypropylenes with and without unsaturated chain end group

Non-isothermal degradation kinetics of filled with rise husk ash polypropene composites

Review on the thermo-oxidative degradation of polymers during processing and in service

Contact Info

Product

Resources

About