We know that generally adding elastomers can increase toughness, adding inorganic fillers can increase rigidity. The most effective approach is a combination of elastomer toughening and filler reinforcement.

Poor impact resistance is a performance defect of some important plastics in the industry. Such as pvc, PS, PP, etc., especially at low temperature, its application is limited due to its low impact resistance. So how to improve it, of course, by adding "impact modifier" to improve.

There are many varieties of impact modifiers , commonly used are ACR -acrylate resin, MBS-methyl methacrylate-butadiene-styrene copolymer, CPE-chlorinated polyethylene, abs, EVA, EPT-ternary Ethylene propylene rubber, etc.

Advantages: Improve impact resistance; ACR is undoubtedly the best comprehensive performance category, MBS is an important impact modifier for transparent products, and occupies an important position in the global impact modifier market.

Disadvantages: adverse effects on mechanical strength. For example, the addition of MBS to PVC reduces the tensile strength and flexural strength. The addition of ACR will also reduce the tensile strength, hardness and Vicat heat resistance of HPVC-high molecular weight PVC. The addition of CPE also reduces the tensile strength, flexural strength and Vicat softening point of the blend.