Impact-Modified Syndiotactic Polystyrene

The role that PPO played in the ductility improvement was investigated. Small-angle X-ray scattering (SAXS) has been measured for the SPS/PPO binary blends as a function of the weight fraction of PPO. Analyzing the electron density correlation function on the basis of Strobl s method, it was found that (a) SAXS intensity profile becomes broader with increasing PPO content and (b) the lamellar thickness decreases with increasing PPO content, while the thickness of the amorphous layer increases. This indicates that PPO resides between the crystalline lamellae and makes the lamellar texture disordered. 

the adhesion of MA-g-SEBS to both domain and matrix was studied. The most important factor should be the repulsive interaction between the modified ethylenebutylene (EB) (MA-g-EB) and the styrene chain of 

Syndiotactic Polystyrene, Edited by Jurgen Schellenberg Copyright 2010 John Wiley Sons, Inc. 

An HISPS is a multicomponent blend comprising SPS, PPO, SEES triblock copolymer, and MA-g-SEBS. Controlling the morphology of HISPS is a key point to enhance the mechanical properties. There are a lot of structural factors that should be controlled, for example, the size and the orientation of elastomer domains and the degree of crystallinity in the SPS matrix, and also the interfacial thickness between the domain and the matrix. 

Kraton G1651 (Kraton Polymers, Houston, TX), Mw = 2.74 X lO g/mol, MJM = 1.32, ( ) = 30% Tuftec M1913 (Asahi Chemicals, Tokyo, Japan) 

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Syndiotactic polystyrene, once commercially available from Dow as Questra , continues to be available from Idemitsu Kosan (Japan)(Xarec ) and is available in fiberglass filled versions as well as impact modified versions for electrical, automotive and appliance applications. Blends with polystyrene are noted and presumably include impact polystyrene to achieve toughened versions. 

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