✦ LIBER ✦

Thermal stability and compatibility of epoxy/polycarbonate and epoxy/tetramethyl polycarbonate blends

✍ Scribed by Doo Sung Lee; Yongsei Kim; Byounglyoul Park; Jinhwan Kim

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 979 KB
Volume: 59
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19960307)59:10<1639::aid-app16>3.0.co;2-r

No coin nor oath required. For personal study only.

✦ Synopsis

A series of the blends of tetrafunctional epoxy resins with polycarbonate (PC) or tetramethyl polycarbonate (TMPC) was prepared to investigate thermal stability and compatibility. The Tg behavior as a function of isothermal curing time was observed. The thermal stability of epoxy and epoxy/thermoplastics blends was estimated using thermogravimetric analysis (TGA). Fourier transform infrared (FTIR) investigation demonstrated the occurrence of thermal degradation and hydrolysis in epoxy and epoxy/PC blends during the curing process. The thermal degradation of cured epoxy was induced with etherification, a sort of side reaction, and resulted in the chain scission of networks leading to the decrease of Te

The variance of thermal stability with a combination of two components in these blends resulted from the difference of the compatibility due to chemical structure similarity. The compatibility was corroborated with the morphology by scanning electron microscopy (SEM).

📜 SIMILAR VOLUMES

Compatibility enhancement of ABS/polycar

Compatibility enhancement of ABS/polycarbonate blends

✍ D. W. Jin; K. H. Shon; H. M. Jeong; B. K. Kim 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 990 KB

The effects of blend composition, melt viscosity of poly(acrylonitrile-butadiene-styrene) (ABS), and compatibilizing effect of poly(methyl methacrylate) (PMMA) on mechanical properties of ABS/polycarbonate (PC) blends at ABS-rich compositions were studied. As the content of PC was increased, impact

The epoxy–polycarbonate blends cured wit

The epoxy–polycarbonate blends cured with aliphatic amine—II. Thermal and mechanical properties mechanisms

✍ Miaw-Ling Lin; Kuo-Hui Chang; Feng-Chih Chang; Ming-Shiu Li; Chen-Chi M. Ma 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 179 KB 👁 2 views

The transamidation reaction converts the carbonate and amine into Naliphatic aromatic carbamate and urea, causing the equivalent of oxirane and amine nonstoichiometric in the primary cure stage. After postcure, the substitution reaction takes place and results in a more tightly crosslinked structure

Viscoelastic and thermal behaviour of pa

Viscoelastic and thermal behaviour of partially compatible polymer blends polycarbonate/tetramethylpolycarbonate

✍ C. Belaribi; G. Marin; Ph. Monge 📂 Article 📅 1986 🏛 Elsevier Science 🌐 English ⚖ 378 KB

Differential scanning calorimetry (DSC) and thermomechanical analysis (TMA) measurements show that, in the case of polycarbonate (PC) with tetramethylpolycarbonate (MPC), the homopolymers are miscible up to 70% PC weight fraction; at higher PC content, an additional PC phase appears. The partial mis

Structures and properties of polycarbona

Structures and properties of polycarbonate-modified epoxies from two different blending processes

✍ Trong-Ming Don; Chao-Hsien Yeh; J. P. Bell 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 292 KB 👁 2 views

It has been proved in our previous study that during the melt-blending of an epoxy oligomer based on the diglycidyl ether of bisphenol-A (DGEBA) with polycarbonate (PC) at 200°C, the secondary hydroxyl groups in the DGEBA react with the carbonate groups in PC through transesterification, resulting i

Miscibility and fracture behaviour of an

Miscibility and fracture behaviour of an epoxy resin-bisphenol-a polycarbonate blend

✍ M.C. Chen; D.J. Hourston; W.B. Sun 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 449 KB

The epoxy–polycarbonate blends cured wit

The epoxy–polycarbonate blends cured with aliphatic amine—I. Mechanism and kinetics

✍ Miaw-Ling Lin; Kuo-Hui Chang; Feng-Chih Chang; Ming-Shiu Li; Chen-Chi M. Ma 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 242 KB 👁 2 views

Reaction mechanism of the PC-epoxy blends cured by aliphatic amine has been investigated by varying PC contents in the blends. The transamidation reaction tends to convert nearly all the carbonates into N-aliphatic aromatic carbamates even at ambient temperature before normal curing. The remaining a