The performance and structural composition of two batches of EPS30R products before and after process optimization were studied.The comparative research results showed that the optimized EPS30R has improved impact strength and flexural modulus.From the perspective of structural composition,molecular weight and its distribution of the two batches of EPS30R products are basically consistent.Compared with EPS30R-1,EPS30R-2 has better rigidity and toughness balance,higher ethylene content,smaller rubber phase size,and more uniform dispersion.At the same time,xylene soluble substance(XS)content of EPS30R-2 is higher and the characteristic viscosity of the soluble part is higher.The previous mentioned structural characteristics are the main factors that make the product have higher impact performance and good balance between rigidity and toughness.Low content of sequence structure rr is beneficial for maintaining the rigidity of polypropylene products.
维普
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