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The preparation of PPO/PS alloys
by：CSSSLD
2021-02-03
Phase structure of the alloy of flexibilizer toughening effect has obvious influence.
The toughening effect of the linear SBS is superior to the star-shaped SBS, EPDM - particle size small
g -
PS toughening effect is better than that of large particle size of EPDM -
g -
PS。
Radial hydrogenated toughening effect is better than that of linear hydrogenation of SBR SBR.
Some synergy between flexibilizer toughening effect, such as linear SBS, with star-shaped SBS toughening effect is better than used alone.
三元乙丙橡胶-
g -
PS is used with linear hydrogenated SBS, the notched impact strength than to use EPDM - alone
g -
PS increased 2 times, SEBS and SBR compound with use, injection molding products processing system impact strength has greatly improved.
content only within a certain range, the higher the content of rubber particles, the smaller the particle size, particle size distribution is narrow, the higher the impact strength of the alloy. PPO grafted PS alloy performance is associated with the grafting and crosslinking of PS, control of the grafting of alloy with high and low crosslinking degree, preparation of high-performance PPO/PS alloys. Two kinds of different polymer blending alloy formation, its structure there are three kinds of situation, if is the thermodynamic compatibility between two polymers, form the miscibility of molecular level system, this kind of alloy has fully compatible jun phase structure, called jun phase polymer alloy.
impact modifier can add alone, also can use two or more at the same time, they will have different degrees of improve the impact strength of PPO/PS alloys. Flexibilizer toughening effect of different kinds, in general, SEBS toughening effect is good. Content of toughening agent on the system of the toughening effect has significant influence. Such as the content of MBS within a certain range, when content more than 5%, the impact strength decline instead, it has to do with elastomer and the compatibility of the matrix.
homogeneous polymer alloy is an important feature of alloying of some important performance become average as a result, the alloy's main performance between two components homopolymer performance. Part two kinds of polymer compatibility, in homogeneous on the macroscopic, microscopic points on the phase structure, this kind of alloy can make the characteristics of two kinds of polymer to realize the combination of positive, make above two polymer alloy performance. Completely incompatible, two components alloy on the macroscopic and microscopic for split phase structure, this kind of alloy has no practical value, usually need to add the capacity of modified compatilizer.
PPO/PS alloy metal homogeneous polymer alloy, PPO in PS's purpose is to reduce the viscosity of PPO, improve the processing properties of PPO, but as a result of PPO compatible with PS, and PS in addition to the processing performance of the PPO worse than many other performance, so the PS in PPO processing performance at the same time, the other properties of PPO varies with PS content, degree of reduced.
the performance of the PPO/PS alloys except on and mix ratio, by controlling the injection molding processing material PS relative molecular mass, relative molecular mass distribution, can change the characteristics of the alloy. In general, the higher the relative molecular mass of the PS, the narrower the relative molecular mass distribution, thermal deformation temperature of the alloy and the higher mechanical properties, but the alloy reduced liquidity. If PPO/PS alloy in the PS is high impact PS, the content of rubber particles in high impact PS, particle size distribution and other factors have influence on the performance of the alloy.
in order to further improve the impact performance of PPO/PS, heat resistance, flame retardant performance, surface gloss, often add other components in the PPO/PS alloys. Pure PPO/PS alloy toughness is very poor, no practical value, usually join polymer rubber or elastic body, improve the impact strength of alloy. Suitable for rubber or elastomer toughening of PPO/PS is mainly containing styrene monomer polymer.
more excellent articles: functional polyphenyl ether, click directly.
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content only within a certain range, the higher the content of rubber particles, the smaller the particle size, particle size distribution is narrow, the higher the impact strength of the alloy. PPO grafted PS alloy performance is associated with the grafting and crosslinking of PS, control of the grafting of alloy with high and low crosslinking degree, preparation of high-performance PPO/PS alloys. Two kinds of different polymer blending alloy formation, its structure there are three kinds of situation, if is the thermodynamic compatibility between two polymers, form the miscibility of molecular level system, this kind of alloy has fully compatible jun phase structure, called jun phase polymer alloy.
impact modifier can add alone, also can use two or more at the same time, they will have different degrees of improve the impact strength of PPO/PS alloys. Flexibilizer toughening effect of different kinds, in general, SEBS toughening effect is good. Content of toughening agent on the system of the toughening effect has significant influence. Such as the content of MBS within a certain range, when content more than 5%, the impact strength decline instead, it has to do with elastomer and the compatibility of the matrix.
homogeneous polymer alloy is an important feature of alloying of some important performance become average as a result, the alloy's main performance between two components homopolymer performance. Part two kinds of polymer compatibility, in homogeneous on the macroscopic, microscopic points on the phase structure, this kind of alloy can make the characteristics of two kinds of polymer to realize the combination of positive, make above two polymer alloy performance. Completely incompatible, two components alloy on the macroscopic and microscopic for split phase structure, this kind of alloy has no practical value, usually need to add the capacity of modified compatilizer.
PPO/PS alloy metal homogeneous polymer alloy, PPO in PS's purpose is to reduce the viscosity of PPO, improve the processing properties of PPO, but as a result of PPO compatible with PS, and PS in addition to the processing performance of the PPO worse than many other performance, so the PS in PPO processing performance at the same time, the other properties of PPO varies with PS content, degree of reduced.
the performance of the PPO/PS alloys except on and mix ratio, by controlling the injection molding processing material PS relative molecular mass, relative molecular mass distribution, can change the characteristics of the alloy. In general, the higher the relative molecular mass of the PS, the narrower the relative molecular mass distribution, thermal deformation temperature of the alloy and the higher mechanical properties, but the alloy reduced liquidity. If PPO/PS alloy in the PS is high impact PS, the content of rubber particles in high impact PS, particle size distribution and other factors have influence on the performance of the alloy.
in order to further improve the impact performance of PPO/PS, heat resistance, flame retardant performance, surface gloss, often add other components in the PPO/PS alloys. Pure PPO/PS alloy toughness is very poor, no practical value, usually join polymer rubber or elastic body, improve the impact strength of alloy. Suitable for rubber or elastomer toughening of PPO/PS is mainly containing styrene monomer polymer.
more excellent articles: functional polyphenyl ether, click directly.
http://www。 csssld。 cn//html/2016/Info_1126/414。 HTML
nantong on suye's official website: http://www. csssld。 cn//
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