The influence of the arrangement of styrene in methyl methacrylate/butadiene/styrene on the properties of PMMA/SAN/MBS blends

Abstract

A series of methyl methacrylate‐butadiene‐styrene (MBS) core–shell impact modifiers were prepared by grafting styrene (St) and methyl methacrylate (MMA) onto polybutadiene (PB) or styrene‐butadiene rubber (SBR) seed latex in emulsion polymerization. All the MBS modifiers were designed to have the same total chemical composition, and Bd/St/MMA equaled 39/31/30, which was a prerequisite for producing transparent blends with poly(MMA)/styrene‐acrylonitrile (PMMA/SAN) matrix copolymers. Under this composition, different ways of arrangement for styrene in MBS led to the different structure of MBS modifier. The concentration of PB or SBR rubber of MBS in PMMA/SAN/MBS blends was kept at a constant value of 15 wt.%. The effects of arrangement of St in MBS on the mechanical and optical properties of PMMA/SAN/MBS blends were investigated. The results indicated that Izod impact strength of PMMMA/SAN/MBS blend with the amount of St grafted on core in MBS was higher than that of blend with the amount of St copolymerized with Bd in core of MBS, while the transparency of blend is opposite. From transmission electron microscopy, it was found that the arrangement of St in MBS influenced the dispersion of blend, which led to different toughness. Copyright © 2013 John Wiley & Sons, Ltd.

Curing characteristics, swelling, and mechanical properties of natural rubber/nitrile butadiene rubber blends with and without compatibilizer

“…It has a good balance of transparency and impact resistance (Takahashi et al, 2015). Styrene and methyl methacrylate (MMA) are grafted onto styrene butadiene rubber (SBR) or poly(butadiene) (PB) particles so that MBS is a typical core-shell rubber modifier (Mousavi & Amraei, 2015;Ren et al, 2014). MBS is an impact modifier polymer that contains 0.01 to 5 percent (w/w) of the polymers of at least one compound of the formula, wherein R 1 and R 2 are C 1 to C 4 alkyl, R 3 and R 4 are HC 1 to C 4 alkyl, or 4-hydoxy 2'-R 2 5'-R 1 -phenyl.…”

Ketahanan Termal dan Ketahanan Perendaman Komposit NBR/EPDM dengan Berbagai Kompatibiliser

“…MBS sebagai kompatibiliser memberikan efek ketahanan termal yang paling baik. Hal ini dimungkinkan karena MBS merupakan material yang lapisan kulit intinya dimodifikasi dengan pencangkokan stirene (St) dan metil-metakrilat (MMA) pada partikel polibutadiena (PB) atau stirena butadiene rubber (SBR) [13] , sehingga dapat mengimprovisasi adhesi antar muka dari matriks karet dan bahan aditifnya. Hal ini membuat komposit lebih mudah menjadi homogen [14] .…”

Properties of ABS/PMMA Binary Blend and ABS/PMMA/MBS Ternary Blend

“…For multiphase polymer materials, surface glossiness is normally limited by the presence of haziness or reduced clarity, which arises primarily from the failure to match the refraction indices of the polymer phases and par-ticle sizes perfectly. 12 Matching the refractive index of rubber with that of the ABS/PMMA blend is difficult because rubbers have relatively low refractive indices. Refractive index can be calculated using the Gladstone-Dale relation as follows:…”

“…Core-shell rubber modifiers, such as methacrylate-butadiene-styrene (MBS), are regularly used to improve the toughness of the polymer matrix because of two major attractive features: (1) the rubbery core provides resistance to impact, whereas the grafted glassy shell provides rigidity and miscibility with the polymer matrix; (2) after melt blending, the rubber particles retain the desired shape and dispersability. 11 Core-shell modifier has been widely used to toughen polymer materials, such as PMMA, 12 PC, 13 and poly(vinyl chloride) (PVC). 11,[14][15][16] The different structures and morphologies of core-shell modifiers influence the impact resistance of the polymer matrix.…”