Thesis (Ph. D.)--Florida State University, 2003. / Advisor: Dr. Chuck Zhang, Florida State University, College of Engineering, Dept. of Industrial Engineering. Title and description from dissertation home page (viewed Apr. 06, 2004). Includes bibliographical references.

Thesis (M.S.)--Florida State University, 2004. / Advisor: Dr. Chuck Zhang, Florida State University, College of Engineering, Dept. of Industrial Engineering. Title and description from dissertation home page (viewed 6/16/04). Includes bibliographical references.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1994. / Vita. Abstract. Includes bibliographical references (leaves 116-118). Also available via the Internet.

O presente trabalho busca o entendimento do aparecimento da fase cristalina em compósitos de polipropileno isotático, que contém carbonato de cálcio, em presença ou não de polipropileno modificado com anidrido maléico (PPMA). Vários tipos de CaCO3 foram utilizados: com diâmetros médios de 0,9 m, com e sem tratamento superficial, 2,5 m e 3,0 m. As duas séries de compósitos, com e sem PPMA, denominadas iPP/CaCO3/PPMA e iPP/CaCO3, foram formuladas com as seguintes razões mássicas, 94,5/5/0,5% e 95/5, respectivamente. Em ambas as séries, observou-se a ocorrência das fases cristalinas e do polipropileno; entretanto, a concentração relativa variou de acordo com o tipo de compósito. A caracterização das fases cristalinas presentes nos compósitos foi realizada utilizando a difratometria de raio-x (DRX) e análises térmicas, principalmente, calorimetria diferencial exploratória (DSC). As análises por DSC incluíram o estudo cinético da cristalização isotérmica e não isotérmica dos compósitos. Os resultados obtidos permitiram identificar os compósitos com maior concentração de fase cristalina e relacionar a sua formação com os constituintes presentes nos compósitos. / The present work aims to understand the occurrence of the beta crystalline phase in composites of isotactic polypropylene with calcium carbonate in the presence or not of polypropylene grafted maleic anhydride (PPMA). CaCO3 having different average diameter were used: 0.9 m with and without surface treatment, 2.5 m and 3.0 m. Both series of composites, one with PPMA and another without, named iPP/CaCO3/PPMA and iPP/CaCO3, were formulated at the following mass proportions: 94.5/5/0.5% and 95/5, respectively. The presence of the e crystalline phases in polypropylene were observed. However, the relative concentration of such phases depended on the composite composition. The characterization of the crystalline phases in composites were performed by using x-ray diffraction (DRX) and thermal analyses, mainly, differential scanning calorimetry (DSC). DSC analysis was used to investigate isothermal crystallization kinetic and nonisothermal crystallization kinetic. The results allowed the identification of the composites with higher concentration of crystalline phase and it was possible to attribute the phase occurrence to the presence of specific constituents of the composites.

O presente trabalho busca o entendimento do aparecimento da fase cristalina em compósitos de polipropileno isotático, que contém carbonato de cálcio, em presença ou não de polipropileno modificado com anidrido maléico (PPMA). Vários tipos de CaCO3 foram utilizados: com diâmetros médios de 0,9 m, com e sem tratamento superficial, 2,5 m e 3,0 m. As duas séries de compósitos, com e sem PPMA, denominadas iPP/CaCO3/PPMA e iPP/CaCO3, foram formuladas com as seguintes razões mássicas, 94,5/5/0,5% e 95/5, respectivamente. Em ambas as séries, observou-se a ocorrência das fases cristalinas e do polipropileno; entretanto, a concentração relativa variou de acordo com o tipo de compósito. A caracterização das fases cristalinas presentes nos compósitos foi realizada utilizando a difratometria de raio-x (DRX) e análises térmicas, principalmente, calorimetria diferencial exploratória (DSC). As análises por DSC incluíram o estudo cinético da cristalização isotérmica e não isotérmica dos compósitos. Os resultados obtidos permitiram identificar os compósitos com maior concentração de fase cristalina e relacionar a sua formação com os constituintes presentes nos compósitos. / The present work aims to understand the occurrence of the beta crystalline phase in composites of isotactic polypropylene with calcium carbonate in the presence or not of polypropylene grafted maleic anhydride (PPMA). CaCO3 having different average diameter were used: 0.9 m with and without surface treatment, 2.5 m and 3.0 m. Both series of composites, one with PPMA and another without, named iPP/CaCO3/PPMA and iPP/CaCO3, were formulated at the following mass proportions: 94.5/5/0.5% and 95/5, respectively. The presence of the e crystalline phases in polypropylene were observed. However, the relative concentration of such phases depended on the composite composition. The characterization of the crystalline phases in composites were performed by using x-ray diffraction (DRX) and thermal analyses, mainly, differential scanning calorimetry (DSC). DSC analysis was used to investigate isothermal crystallization kinetic and nonisothermal crystallization kinetic. The results allowed the identification of the composites with higher concentration of crystalline phase and it was possible to attribute the phase occurrence to the presence of specific constituents of the composites.

Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 93-100). Available also in a digital version from Dissertation Abstracts.

Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 129-132). Available also in a digital version from Dissertation Abstracts.

Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2008. / Includes bibliographical references (leaves 85-86). Also available online.

Thesis (M.S.) in Civil Engineering--University of Maine, 2009. / Includes vita. Includes bibliographical references (leaves 115-121).