Low Molecular Weight PPE Resin as Flow Promoter to Thermoplastic Resins
Publication Date: 2002-Nov-07
The IP.com Prior Art Database
PPOÒ SA120 resin is a new low molecular weight (Mn »2500) polyphenylene-ether (PPE) resin recently commercialized by GE Plastics as a polymer additive. In addition to having the well-known properties inherent to PPE, this new resin has an excellent thermal performance (glass transition temperature (Tg) of 165°C) combined with a characteristic feature of improved processability. The low molecular weight of the new PPE resin allows PPE to be more easily processed in high heat thermoplastic systems. Comparative examples of PPOÒ SA120 and polystyrene are shown in the report. Reported herein is an evaluation of PPOÒ SA120 resin in a PPE-based thermoplastic formulation. Data shows that adding lower molecular weight PPE leads to a higher flow promotion. It also could have higher impact resistance and a negligible decrease on heat distortion temperature (HDT). Improvements in melt flow index and impact resistance are gained with the addition of low molecular weight PPE. SA120 may also be added to many other thermoplastics as a flow promoter. Key Words: polyphenylene oxide, PPO, polyphenylene ether, PPE, flow promotion, flow promoter, high heat thermoplastic, melt flow
Jan. 15, 2002
Experimental: SA120/high IV PPE blend
DOE results (Design of Experiments)
Global Noryl® Resin, GE Plastics
Keep heat performance
No remarkable drop at Tg
Improve flow (MFI)
Lower processing temp.
high heat performance
Low IV, high flow
Widely used at Auto, Electric, Machine…
No more design space at present material !!
MFI 12.4 g/10min
Izod 25 kgcm/cm (4.59 ft-lb/in)
HDT 159.8 °C
* Refers to High IV PPE
PPE/SA120 blend (Four Components Mixture DOE)
Extruder: twin screw
Ext. Temp. (C): 250 (ext. pattern: 01-09)
Screw speed (rpm): 200
Output (kg/hr): 40
(based on Noryl® resin)
PPE (high IV) 70-95
SA120 (low IV) 0-20
Carbon black 0.5
Drying temp. 120C, 2hr
Injection Molding pattern: M3-01
using standard ASTM conditions.
Izod (kgcm/cm): 1/8 in.
Tensile Strength (kg/cm2): ASTM-1, 10mm
Tensile Elongation (%): ASTM-1
Flexural Strength (kg/cm2): ¼ in., 2.5mm
Flexural Modulus (kg/cm2): ¼ in.
HDT (C): ¼ in., load...