Raman spectroscopic studies of the cure of dicyclopentadiene (DCPD)

Hygrothermal aging effects on fatigue of glass fiber/polydicyclopentadiene composites

“…(Differences between aging in DI water and salt water will be discussed in Section 3.3.) The intrinsic hydrophobicity of pDCPD resin can be explained on a molecular level: pDCPD polymer chains lack hydrophilic groups, while epoxy polymer chains contain hydrophilic groups such as hydroxyls, fostering water uptake [24]. Fig.…”

Adding Autonomic Healing Capabilities to Polyethylene Oxide

“…[10][11][12][13][14][15][16][17][18][19] The stirring rate for this synthesis was 400 rpm, the pH was kept at 3.5, and the reaction temperature was set at 55 • C. The synthesis of microcapsules was stopped after 5 h.…”

“…10,11,18,19 The list of chemicals (including quantities, details about vendors, and description of the synthesis process) used to obtain polyurea formaldehyde (PUF) microcapsules are given elsewhere. [10][11][12][13][14][15][16][17][18][19] Autonomic healing capabilities have been added to PEO by using the following solution path: PEO (10 g) was dissolved in deionized water (300 mL). Powder of FGGC was added to the PEO solution and mixed for 30 min at 500 rotations per minute (rpm).…”

Process monitoring of polymer melts using in-line spectroscopy

“…A significant increase in the intensity of the feature at 1660 cm À1 can be observed over A simultaneous decrease in the v(C¼C) mode at 1568 cm À1 is also seen, relating to the destruction of the cyclic double bond on initial ring opening of the bicyclic system. Following the initial significant changes in the respective band intensities, more subtle Change in calculated mean residence with material mass flow rate during twin-screw extrusion changes in intensity are observed up to and over the total 15 h duration of the cure reaction, indicating that the reaction has not run to completion (Barnes et al, 2005a).…”