The nucleation effect of modified carbon black on crystallization of poly(lactic acid).(Report): An article from: Polymer Engineering and Science
Book Details
PublisherSociety of Plastics Engineers, Inc.
ISBN / ASINB003ZXP94Q
ISBN-13978B003ZXP948
MarketplaceFrance 🇫🇷
Description
This digital document is an article from Polymer Engineering and Science, published by Society of Plastics Engineers, Inc. on August 1, 2010. The length of the article is 5102 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.
From the author: The nonisothermal crystallization of poly(lactic acid) (PLA), PLA/carbon black (CB), and PLA/modified carbon black (MCB) composites were investigated using differential scanning calorimetry (DSC) analysis. The rate of crystallization and the spherulitic morphologies of the PLA and PLA/MCB composites during isothermal crystallization were investigated using DSC and observed by means of polarizing optical microscopy (POM), respectively. The results show that either CB or MCB acts as an efficient nucleating agent for PLA. The nucleation activities of CB and MCB were quantitatively determined. It is shown that MCB has higher nucleating activity than CB in PLA. An isoconversional method correlates the temperature dependence of the effective activation energy and was used to evaluate the effective activation energy and was used to evaluate the effective activation energy of PLA and PLA/MCB composites. It is confirmed that MCB advances the nuclei density and promotes the crystallization rate of the PLA matrix significantly. In addition, an interesting phenomenon of the periodic cracks of PLA spherulites observed by using POM is reported. The unbalanced surface stresses arising from growth features and thermal shrinkage may be the two main factors accounting for the formation of target pattern cracks. POLYM. ENG. SCI., 50:1658-1666, 2010. [C] 2010 Society of Plastics Engineers
Citation Details
Title: The nucleation effect of modified carbon black on crystallization of poly(lactic acid).(Report)
Author: Zhizhong Su
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: August 1, 2010
Publisher: Society of Plastics Engineers, Inc.
Volume: 50 Issue: 8 Page: 1658(9)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
From the author: The nonisothermal crystallization of poly(lactic acid) (PLA), PLA/carbon black (CB), and PLA/modified carbon black (MCB) composites were investigated using differential scanning calorimetry (DSC) analysis. The rate of crystallization and the spherulitic morphologies of the PLA and PLA/MCB composites during isothermal crystallization were investigated using DSC and observed by means of polarizing optical microscopy (POM), respectively. The results show that either CB or MCB acts as an efficient nucleating agent for PLA. The nucleation activities of CB and MCB were quantitatively determined. It is shown that MCB has higher nucleating activity than CB in PLA. An isoconversional method correlates the temperature dependence of the effective activation energy and was used to evaluate the effective activation energy and was used to evaluate the effective activation energy of PLA and PLA/MCB composites. It is confirmed that MCB advances the nuclei density and promotes the crystallization rate of the PLA matrix significantly. In addition, an interesting phenomenon of the periodic cracks of PLA spherulites observed by using POM is reported. The unbalanced surface stresses arising from growth features and thermal shrinkage may be the two main factors accounting for the formation of target pattern cracks. POLYM. ENG. SCI., 50:1658-1666, 2010. [C] 2010 Society of Plastics Engineers
Citation Details
Title: The nucleation effect of modified carbon black on crystallization of poly(lactic acid).(Report)
Author: Zhizhong Su
Publication:Polymer Engineering and Science (Magazine/Journal)
Date: August 1, 2010
Publisher: Society of Plastics Engineers, Inc.
Volume: 50 Issue: 8 Page: 1658(9)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
