Connection of plastification and antiplastification with relaxation processes in amorphous polycarbonate

Thermal Expansion Behavior of Antiplasticized Polycarbonate

“…As similar to other antiplasiticized systems, p-tPh only reduces the mobility of local chains by filling the free volume of PC, which has been reported by a number of researchers using various antiplasticizers. 3,[16][17][18][20][21][22] In fact, there is no peak shift in the infra-red spectra (but not present here) by the p-tPh addition.…”

“…11) To counter this normal behavior of plasticization, additives known to enhance the modulus are used, which is called antiplasticization. According to previous studies, 3,[15][16][17][18][19][20][21][22][23][24][25][26][27] the decrease in the free volume is believed to be the origin of the modulus enhancement. Therefore, β -relaxation of an amorphous polymer, i.e., local relaxation mode, is strongly affected by an antiplasticizer, because the mobility in a local mode is suppressed by loss of the free volume.…”

Plasticization, Antiplasticization, and Fragility in Blends of Polyvinyl Butyral and Polyethylene Glycol Dimethyl Ether

“…The latter observation discloses the role of PEGDME as an anti‐plasticizer of PVB in the glassy region. The almost linear rise of E ′ without any change of slope, as well as its uniform slight decrease observed at T g,2 , denote compatibility of the two polymers, [ 17,18 ] at least up to the highest concentration explored. As better explained below, both the calorimetric and mechanical observations point to the compatibility of the components, as a result of interchain interactions activated by the polar groups of both the components.…”

Mechanical and Optical Properties of Polycarbonate Containing p-Terphenyl

“…However, a local relaxation mode of a polymer is always reduced by an antiplasticizer, because the mobility in a local mode is restricted by losing the free volume. This anomalous but well-known behavior has been reported for various polymers such as PC, ,− poly(vinyl chloride) PVC, − poly(methyl methacrylate) PMMA, ,, and cellulose esters. ,− Jackson and Caldwell originally reported antiplasticizers for PC. − It is also known that m -terphenyl, methylabietate, tetrachlorodiane, and dimethylnaphthalene tetramer act as antiplasticizers for PC. Antiplasticizers enhance the modulus and reduce the β-relaxation mode of PC, at around −100 °C, which is attributed to a ring-flip process of phenyl groups and rotation of the phenylene rings. − …”

“…12,22−24 Jackson and Caldwell originally reported antiplasticizers for PC. 10−12 It is also known that mterphenyl, 3 methylabietate, 13 tetrachlorodiane, 14 and dimethylnaphthalene tetramer 22 act as antiplasticizers for PC. Antiplasticizers enhance the modulus and reduce the βrelaxation mode of PC, at around −100 °C, which is attributed to a ring-flip process of phenyl groups and rotation of the phenylene rings.…”