1973
DOI: 10.1016/0021-9797(73)90406-2
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The effect of polymer—filler interaction energy on the T′g of filled polymers

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Cited by 113 publications
(38 citation statements)
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“…6. It is clear that in both E-D and E-BA films, the T g increases with increased pollen loading, suggesting restriction of epoxy chains surrounding pollen surfaces [37,38]. This correlates with the observed interfacial and mechanical properties observed in the films.…”
Section: Thermal Propertiessupporting
confidence: 64%
“…6. It is clear that in both E-D and E-BA films, the T g increases with increased pollen loading, suggesting restriction of epoxy chains surrounding pollen surfaces [37,38]. This correlates with the observed interfacial and mechanical properties observed in the films.…”
Section: Thermal Propertiessupporting
confidence: 64%
“…These temperatures corre- late well with those previously observed in pure PDMS samples using DMA. 37 In contrast, the nanocomposites exhibit a less well-defined transition at Ϫ107 to Ϫ100°C. The crystalline transitions have also been extremely broadened, such that separating the ␣ transition from the crystalline transition is extremely difficult and no temperature assignments were attempted.…”
Section: Dynamic Mechanical Analysismentioning
confidence: 93%
“…Other workers have studied pure PDMS filled with fumed silica (14 -31 vol %) or sodium chloride (48 vol %), reporting that fumed silica filled samples exhibit broadened thermal transitions while the sodium chloride filler did not broaden or shift the transitions. 37 The difference between the two systems was attributed to polymer-fumed silica interactions, which are absent in sodium chloride. We note that the level of reinforcement necessary to observe broadened transitions in either of the previous studies is well above that in layered silicate nanocomposites, a reflection of the high amounts of bound polymer formed at low concentrations of layered silicate.…”
Section: Dynamic Mechanical Analysismentioning
confidence: 98%
“…Com relação ao aumento no valor de Tg apresentado pelo compósito 90:10, outros autores [18,19,26] também observaram esse aumento com a inclusão de partículas rígidas em matrizes poliméricas, o que foi atribuído às interações entre as partículas e o polímero, eles sugeriram que ocorreu imobilização parcial das cadeias poliméricas e bloqueios físicos nas configurações moleculares nas vizinhanças das partículas. A hipótese desses autores foi baseada no estudo de Yim et al [27] que provaram que ocorreu a formação de uma camada mais rígida nas vizinhanças das partículas em compósitos particulados, devido a adsorção das moléculas do polímero na superfície das partículas. Portanto, a inibição da Tg no compósito 80:20 pode estar relacionada a imobilização molecular, como também a diminuição de volume livre da matriz de PEAD com presença de maior teor de partículas, conduzindo a maior fricção entre as próprias partículas, presentes nos aglomerados fracamente ligados nesse compósito (veja a Figura 5c).…”
Section: Análise Termo Dinâmico Mecânica (Dma)unclassified