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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Latex and poly-DADMAC as soil conditioners /

Bernas, Siti Masreah. January 1995 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Dept. of Soil Science, 1997. / Copies of author's previously published articles inserted. Includes bibliographical references (p. 110-123).

The intraction of associative polymer with inorganic pigment dispersion /

Sa-nguandekul, Sopee, January 1997 (has links)
Thesis (Ph. D.)--Lehigh University, 1997. / Includes vita. Includes bibliographical references.

Aggregation of polystyrene latexes stabilized with conventional, reactive, and polymeric surfactants /

Phattanarudee, Siriwan. January 2003 (has links)
Thesis (Ph. D.)--Lehigh University, 2004. / Includes bibliographical references and vita.

Structured latex particles for modification of polycarbonate /

Hu, Maria Rong, January 1996 (has links)
Thesis (Ph. D.)--Lehigh University, 1996. / Includes vita. Includes bibliographical references (leaves 197-200).

Flüssigphasenabscheidung von Titandioxid auf Polymerlatex-Templaten

Strohm, Holger. Unknown Date (has links) (PDF)
Universiẗat, Diss., 2005--Würzburg.

Latexallergie und Latexsensibilisierung eine Verlaufsstudie /

Leeden, Wiebke Friederike van der. January 2004 (has links) (PDF)
München, Techn. Univ., Diss., 2004.

The effect of crosslinking on latex film formation /

Mohd. Ghazaly, Hafsah. January 1999 (has links)
Thesis (Ph. D.)--Lehigh University, 2000. / Includes bibliographical references and vita.

Export dat a funkcionality systému ReLa

Šrankota, Pavel January 2010 (has links)
No description available.

Moderní přístupy k tvorbě tabulek v systému TeX/LaTeX

Prokeš, Jan January 2013 (has links)
No description available.

Prevulcanização do látex natural extraído da hancornia speciosa gomes (Mangabeira) e da hevea brasiliensis (seringueira)

Gomes, Willian Pereira [UNESP] 27 March 2013 (has links) (PDF)
Made available in DSpace on 2016-03-07T19:20:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-03-27. Added 1 bitstream(s) on 2016-03-07T19:24:43Z : No. of bitstreams: 1 000858512.pdf: 2016296 bytes, checksum: 1e82db6903bf61cb290beaca684ff652 (MD5) / A borracha natural é um dos polímeros mais consumidos mundialmente, onde seu principal mercado é o setor pneumático com cerca de três quartos do consumo total. A seringueira é a mais importante produtora de borracha natural, sendo responsável por cerca de 99% da produção mundial A mangabeira é também uma arvore lactescente produzida quase em sua totalidade de forma extrativista e visada somente para a produção do seu fruto, a mangaba. Embora já ter sido utilizada comercialmente em períodos emergenciais, hoje a borracha natural provinda da mangabeira não tem qualquer utilização tecnológica, pois é considerada uma borracha de qualidade inferior. Neste trabalho foram produzidos filmes de borracha prevulcanizada com o látex de seringueira, de mangabeira e também com a mistura (m/m) do látex de mangabeira no látex de seringueira, nas proporções de 95/5, 90/10, 80/20, 70/30 e 60/40. Os resultados mostraram que o número de ligações cruzadas, tensão na ruptura e dureza Shore A são dependentes do sistema de vulcanização convencional, semi-eficiente ou eficiente, e da temperatura e do tempo de cozimento do latex de ambas as fontes. Os valores dessas propriedades encontrados para a borracha da mangabeira foram inferiores ao da borracha da seringueira. O maior valor de tensão de ruptura, dureza Shore e deformação encontrada para a borracha de seringueira foi alcançado utilizando o sistema convencional com 3 horas de cozimento sob 80°C. Esses valores são: 22 MPa, 42 Shore A e 895% o que é aproximadamente 150%, 68% e 25%, respectivamente, maiores do que os maiores valores encontrados para a borracha da mangabeira (8,8 MPa, 25 Shore A e 714%) que foi obtido utilizando o sistema semi-eficiente. As borrachas obtidas da mistura dos látex apresentaram, para composições inferiores a 20%, em massa de borracha de mangabeira, um comportamento similar a da seringueira mostrando ser viável a sua utilização para fabricação... / Natural rubber is one of the most consumed polymer in the worldwide and pneumatic industry is responsible for approximately three fourths of total consumption. Hevea brasiliensis is the most important producer of natural rubber, being responsible for 99% of global production. The Hancornia speciosa Gomes is also produces white latex that can be tapped from the tree similarly to Hevea. Although it has been used commercially in emergency periods, nowadays Hancornia rubber has no technology use due to its low production and rubber quality. The latex blend can be a viable alternative to the use of mangabeira latex as one additional income besides of fruit commercialization. In this sense, the proposal of this work was to evaluate the influence of prevulcanization condition in the Hancornia speciosa Gomes (mangabeira) and Hevea brasiliensis (seringueira) latexes and also in its mixture, on the rubber proprieties. The latexes were prevulcanizated by conventional (CV), semi-efficient (SEV) and efficient (EV) vulcanization systems under temperatures of 60, 70 and 80 ° C. The crosslinked quantity was investigated by the swelling technique and the mechanical proprieties were obtained from tensile experiments and shore A hardness. The results showed that the quantity of crosslinked, stress at break and shore hardness are dependent of prevulcanization condition. The values of these proprieties found for mangabeira rubber were lower than the values found for the seringueira rubber. The highest stress at break, shore hardness and strain to seringueira and mangabeira rubber were obtained using the CV and SEV systems, respectively, under temperature of 80° C for 3 hours. Theses value are: 22 MPa, 42 shore A and 895% that are around 150%, 68% e 25%, respectively, higher than found to mangabeira rubber (8,8 MPa, 25 Shore A and 714%). The rubbers obtained from mixture of latex have the mechanical proprieties closed to the seringueira rubber for blends ...

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