Evaluation of thermal behavior of latex membranes from genetically improved rubber tree ( Hevea brasiliensis)

• Published in: Thermochimica acta Vol. 445; no. 1; pp. 27 - 31
• Main Authors: de Oliveira, L.C.S., de Arruda, E.J., Favaro, S.P., da Costa, R.B., Gonçalves, P.S., Job, A.E.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-06-2006; Elsevier Science
• Subjects: Applied sciences; Clone; DMA; DSC; Exact sciences and technology; Latex; Organic polymers; Physicochemistry of polymers; Properties and characterization; TG/DTG; Thermal analysis; Thermal and thermodynamic properties; DMA; Thermal analysis; DSC; TG/DTG; Latex; Clone; Differential scanning calorimetry; Hevea brasiliensis; Pyrolysis; Laticiferous plant; Storage modulus; Thermogravimetry; Glass transition temperature; Thermal stability; Dynamic mechanical properties; Dicotyledones; Angiospermae; Euphorbiaceae; Membrane; Hardwood forest tree; Spermatophyta; Rubber
• ISSN: 0040-6031; 1872-762X
• DOI: 10.1016/j.tca.2006.03.027

Thermal stability, thermal decomposition process, residual mass, temperature of glass transition (
T
g) and temperature dependence of storage modulus (
E’), were determined for latex membranes prepared from six clones of
Hevea brasiliensis: IAC 331, IAC 332, IAC 333 and IAC 334 grown at experimental plantations of Instituto Agronômico de Campinas (IAC) in Votuporanga, São Paulo State, Brazil. Latex membranes from GT1 and RRIM 600 Asian matrix clones were used as references. The thermal behavior of latex membranes from genetically improved rubber trees was characterized using thermogravimetry/derivative thermogravimetry (TG/DTG), differential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The thermal behavior of latex from clones studied in the present work showed similar features of the clones previously reported (IAC 40, IAC 300, IAC 301, IAC 328, IAC 329 and IAC 330), with mass loss in four consecutive steps, except IAC 333, which showed an additional mass loss step.