Page 282 - Engineering Plastics Handbook

244 Engineering Plastics

TABLE 11.4 Composition of Principal LCPs
GF-reinforced
Supplier/trademark Composition Grade DTUL, °C
Sumitomo Chem., E5008 335
Solvay/ O CO O O CO CO E4008 313
SUMIKASUPER E6008 279
®
LCP , XYDAR ® E7008 242
RC210 349
FC110 345
G430 314
G330 260
G540 240
Ticona, O CO CO S135 340
Polyplastics/ O T130 300
VECTRA ® E130i 275
O O CO CO C130 240
A130 230
O CO O O
7130 295
DuPont/ZENITE ® 6130 265
O O CO Y CO

Toray/SIVERAS ® O CO O X O CO CO L304G35 275
L204G35 250

aromatic carboxy compound such as TPAand IPAand aromatic dihydroxy
compound, is well known, this process is not believed to be feasible in
commercial production.
The compositions of principal LCPs are shown in Table 11.4.

Properties
Characteristics of LCP [18]
As can be seen from Fig. 11.2, many fibrils are observed in the cross sec-
tion of tensile fractured as-spun fiber LCP. These fibrils are acting as if
they are reinforcements, and therefore LCP is often referred to as self-rein-
forced polymer. However, this anisotropy is a big practical problem when
LCPs are used in injection-molded parts because LCPs produce oriented
moldings with anisotropic mechanical and thermal properties. Properties
along the flow direction tend to be superior to those across the flow direc-
tion. Fillers represented as glass fiber are often added to LCPs to reduce
the anisotropy because the addition of any filler disrupts the alignment
of the LCP molecules. This is just the reverse of what is experienced with