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As a versatile coordinator in PVC processing, we optimize melt flowability, improve molding stability, and balance product mechanical properties to achieve a dual improvement in processing efficiency and product quality.

ACR molecules can tightly adhere to the surface of PVC particles, acting as a "thermal conduction mediator" to accelerate heat transfer to the interior of the particles. At the same time, they utilize their compatibility with PVC to penetrate into the gaps between particles, weakening the intermolecular forces between PVC molecules. This process not only shortens the plasticization time (for example, in extrusion processing, plasticization efficiency can be increased by 10% -20%), but also enhances the crushing effect of shear force on particles, allowing PVC primary particles to be more evenly dispersed and avoiding local agglomeration or unmelted particles caused by uneven plasticization.

The long-chain structure of ACR can intercalate between PVC molecular chains, similar to adding "rolling bearings" between molecules, significantly reducing melt viscosity. During the injection molding or extrusion process, this effect allows the melt to fill the mold cavity more smoothly (especially for complex shaped products such as irregular pipe interfaces), reducing pressure fluctuations caused by flow obstruction and lowering molding defects (such as material shortage and weld lines).

When PVC melt flows at high shear rates (such as blown film or sheet extrusion), the melt without ACR is prone to surface roughness, ripples, and even fracture (i.e., "melt fracture") due to uneven molecular chain orientation; ACR can regulate the relaxation rate of molecular chains, stabilize the flow state of the melt, and keep the surface of the product smooth (for example, the transmittance of transparent PVC sheets can be increased by 3% -5%).

ACR is not easily decomposed at high temperatures and can reduce the degradation reactions of PVC molecular chains caused by high temperatures (such as avoiding the release of hydrogen chloride gas), prolong the residence time of materials in processing equipment (such as staying in extruders for an additional 5-10 seconds without yellowing), and provide sufficient time for the molding of complex products.

ACR particles are dispersed in the form of microspheres in the PVC matrix. When the product is impacted, these microspheres can absorb energy and cause microcracks in the matrix (rather than direct fracture), especially in low temperature environments (such as -10 ℃), which can increase the impact strength of PVC products by 30% -50% (for example, the impact resistance of hard PVC sheets is close to that of ABS materials).

ACR containing special functional groups (such as methyl methacrylate butyl acrylate copolymer) can form a "protective film" on the surface of PVC, reducing the damage of UV rays to PVC molecular chains and delaying product aging (such as outdoor PVC billboards, adding ACR can extend the service life by 1-2 years).

ACR has a relatively small impact on the hardness of PVC, but it slightly reduces the elastic modulus (about 5% -10%), making the product slightly flexible while maintaining rigidity (for example, PVC window frames are less likely to crack due to excessive rigidity when temperature changes).